I would like to present Scriptural evidence that the 50 days is beyond the 7 Sabbaths complete.
In the third month after the children of Yisra’ĕl had come out of the land of Mitsrayim, on this day they came to the Wilderness of Sinai.
First of all I’m not going to claim to understand everything about these Scriptures from Shemoth chapters 19-24. According to Shemoth 19:1 it would seem because of the wording that the children of Yisra’el had come to the wilderness on the same day – the fifteenth – after leaving Mitsrayim/Ramses. Actually, they left Ramses on the 15th and they left the land of Mitsrayim at the crossing of the Sea of Reeds, so technically there are two times that they left Mitsrayim.
So if 19:1 is referring to the day they left Ramses (on the 15th day of the 1st moon) we could assume that this is speaking of the 15th day of the third moon. Obviously they are calculating by the moon/months. Now from the 15th of the first month to the 15th of the third month is 8 weeks or one complete month of 29 or 30 days and two half months of 15 days. Now remember when we are counting months we are also counting new moon days. Now on a continual count 8 weeks equals 56 days; which is beyond the 50 day count. For the lunar count you start with the fifteenth day of the first month to the end of the first month; depending on how long the month itself is, it would be either 14 or 15 days to get to the beginning of the second month. The second month would be 29 or 30 days long and from the beginning of the third month to the 15th is 15 days. So we don’t know how long the first or second month was, so we’ll just say out of conjecture that the first month was 29 days and the second month is 30 days. So that would be 14 + 30 + 15 = 59. Now according to the month count even if there were back to back 29 day months that is still 8 days beyond the 50 day count.
It has been suggested that when they came to the wilderness it was the first day of the third month; 14 + 30 + 1= 45 days – plus two days of being set-apart and Yahuah coming down on the third day; so that would be 14 + 30 + 1 + 3 = 48 days. And if the first month and the second month both had thirty days in them that would be 15 + 30 + 1 + 3 = 49. Which is still one day shy of the 50th day. Technically if you count the first day of the month as the first day of setting them apart then you would have to subtract a day which equals 48. Also notice in the count that we did give the benefit of the doubt for two 30-day months. This math does not work either; although, it is very much closer.
But there is a 50-day count mentioned in the Scriptures. This 50-day count begins from the first day that they are to be set-apart.
10 And Yahuah said to Mosheh, “Go to the people and set them apart today and tomorrow. And they shall wash their garments,
11 and shall be prepared by the third day. For on the third day Yahuah shall come down upon Mount Sinai before the eyes of all the people.
Here we can see three days from the time they are to be set-apart to the time Yahuah comes down upon the mountain.
12 And Yahuah said to Mosheh, “Come up to Me on the mountain and be there, while I give you tablets of stone, and the Torah and the command which I have written, to teach them.”
13 And Mosheh arose with his assistant Yehoshua, and Mosheh went up to the mountain of Elohim.
14 And he said to the elders, “Wait here for us until we come back to you. And see, Aharon and Hur are with you. Whoever has matters, let him go to them.”
15 And Mosheh went up into the mountain, and a cloud covered the mountain.
16 And the esteem of Yahuah dwelt on Mount Sinai, and the cloud covered it for six days. And on the seventh day He called to Mosheh out of the midst of the cloud.
17 And the appearance of the esteem of Yahuah was like a consuming fire on the top of the mountain, before the eyes of the children of Yisra’ĕl.
18 And Mosheh went into the midst of the cloud and went up into the mountain. And it came to be that Mosheh was on the mountain forty days and forty nights.
We see Mosheh went up to the mount with his assistant Yehoshua and the elders and he told the elders to wait here for us until we come back to you. Notice the cloud covered the mountain for six days and on the 7th day Yahuah called Mosheh and he went into the midst of the cloud and was there 40 days and 40 nights.
We know the people were set-apart for three days and Yahuah came down upon the mountain and started speaking the commands. But remember the people did not want to hear HIM and told Mosheh we hear you. After that point, Yahuah quit speaking in their presence and gave the rest of the laws through Mosheh to give back to the people. So in essence, the people rejected hearing Yahuah directly. But the point is, we have an exact 50-day count from the time the people were to be set-apart until the time Mosheh came down off the mountain after the 40 days and 40 nights. Of course, we know what happened when he came down. He found leaven in the camp; thereby throwing the two loaves of the commandments to the ground. Oh, I meant tablets…. It is rather interesting that the wheat crop is presented in the form of two leavened loaves. And we know what agent the leaven represents.
Anyway, three days to be set-apart and Yahuah speaking to the people, seven days Mosheh, Aaron, Nadab, Yehoshua, the seventy elders were on the mount and then another 40 days that Mosheh went into the midst of the cloud and went up into the mountain. 3 + 6 (Moshe went up on the 7th) + 40 = 49 The day that Mosheh came down and found the children of Yisra’el whoring with their calf was the 50th day from the time that Yahuah called Yisra’el to be set-apart and be prepared by the third day. This is a 50-day count that is recognizable as such and this takes place after the 7 Sabbaths complete.
We know in the account of the 'pentecost' in Acts there were 3,000 that were added that day - we know also that at the 50th day when Moshe came down off the mount that there were 3,000 lost that day. Is this a coincidence? Or is this Yahuah's way of letting us know - 3,000lost, 3,000 added. There are those with the traditional 50-day count of the omer that believe that this is related to one another but what they fail to realize is that the 3,000 that were lost in the Exodus account came 50 days after the seventh sabbath.
27 And he said to them,“Thus said Yahuah Elohim of Yisra’ĕl: ‘Each one put his sword on his side, pass over to and fro from gate to gate in the camp, and each one slay his brother,and each one his friend, and each one his relative.’ ”
28 And the sons of Lĕwi did according to the word of Mosheh. >>And about three thousand men of the people fell that day.
29 And Mosheh said, >>>“You are ordained for Yahuah today> so as to bring upon you a blessing today.”
And this Yahuah did on the 50th day...
1 And when the day of Pentecost was fully come, they were all with one accord in one place.
2 And suddenly there came a sound from the heaven, as of a rushing mighty wind, and it filled all the house where they were sitting.
3 And there appeared to them divided tongues, as of fire, and settled on each one of them.
4 And they were all filled with the Set-apart Spirit and began to speak with other tongues, as the Spirit gave them to speak.
Then those, indeed, who gladly received his word, were immersed. >>And on that day about three thousand beings were added to them.