Exodus 34:22

Overview - Exodus 34
The tables are renewed.
The name of the LORD proclaimed.
Moses entreats God to go with them.
10 God makes a covenant with them, repeating certain duties of the first table.
28 Moses, after forty days in the mount, comes down with the tables.
29 His face shines, and he covers it with a vail.
Treasury of Scripture Knowledge

Exodus 34:22  (King James Version)
And thou shalt observe the feast of weeks, of the firstfruits of wheat harvest, and the feast of ingathering at the year's end.

feast of weeks
23:16 Numbers 28:16-31 ; 29:12-39 Deuteronomy 16:10-15 ; John 7:2 ; Acts 2:1

year's end
Hebrew revolution of the year.