Exodus 7:7

7:7 Now Moses was eighty years old and Aaron was eighty-three years old when they spoke to Pharaoh.

Exodus 21:11

21:11 If he does not provide her with these three things, then she will go out free, without paying money.

Exodus 23:17

23:17 At three times in the year all your males will appear before the Lord God.

Exodus 34:23

34:23 At three times in the year all your men must appear before the Lord God, the God of Israel.