Exodus 34:22

And {you yourself} will observe the Feast of Weeks--the firstfruits of the wheat harvest--and the Feast of Harvest Gathering at the turn of the year.

Exodus 23:16

And [you will keep] the Feast of Harvest, [with] the firstfruits of your work, what you sow in the field. And [you will keep] the Feast of Harvest Gathering when the year goes out, when you gather your work from the field.

Numbers 28:16-31

" 'On the fourteenth day of the first month [is] the Passover for Yahweh.

Numbers 29:12-39

" 'Then on the fifteenth day of the seventh month you will have a holy convocation; {you will not do any regular work}, and you will hold a religious feast for Yahweh for seven days.

Deuteronomy 16:10-15

And [then] you shall celebrate the Feast of Weeks for Yahweh your God with the measure of the freewill offering of your hand that you shall give [just] as Yahweh your God has blessed you.

John 7:2

Now the feast of the Jews--the [feast of] Tabernacles--was near.

Acts 2:1

And when the day of Pentecost had come, they were all together in the same [place].

Treasury of Scripture Knowledge

Summary

And thou shalt observe the feast of weeks, of the firstfruits of wheat harvest, and the feast of ingathering at the year's end.

Bible References

Feast of weeks

Exodus 23:16
And [you will keep] the Feast of Harvest, [with] the firstfruits of your work, what you sow in the field. And [you will keep] the Feast of Harvest Gathering when the year goes out, when you gather your work from the field.
Numbers 28:16
" 'On the fourteenth day of the first month [is] the Passover for Yahweh.
Numbers 29:12
" 'Then on the fifteenth day of the seventh month you will have a holy convocation; {you will not do any regular work}, and you will hold a religious feast for Yahweh for seven days.
Deuteronomy 16:10
And [then] you shall celebrate the Feast of Weeks for Yahweh your God with the measure of the freewill offering of your hand that you shall give [just] as Yahweh your God has blessed you.
John 7:2
Now the feast of the Jews--the [feast of] Tabernacles--was near.
Acts 2:1
And when the day of Pentecost had come, they were all together in the same [place].

General references

Exodus 23:14
" 'Three times in the year you will hold a festival for me
Leviticus 23:15
" 'And you shall count for yourselves {from the day after} the Sabbath, from the day of your bringing the wave offering's sheaf--[there] shall be seven full weeks.
Deuteronomy 16:9
"You shall count [off] seven weeks for you; {from the time you begin to harvest the standing grain} you shall begin to count seven weeks.