Numbers 28:26

Also in the day of the first-fruits, when ye offer a new meal-offering unto Jehovah in your feast of weeks, ye shall have a holy convocation; ye shall do no servile work;

Exodus 23:16

and the feast of harvest, the first-fruits of thy labors, which thou sowest in the field: and the feast of ingathering, at the end of the year, when thou gatherest in thy labors out of the field.

Exodus 34:22

And thou shalt observe the feast of weeks, even of the first-fruits of wheat harvest, and the feast of ingathering at the year's end.

Leviticus 23:10

Speak unto the children of Israel, and say unto them, When ye are come into the land which I give unto you, and shall reap the harvest thereof, then ye shall bring the sheaf of the first-fruits of your harvest unto the priest:

Leviticus 23:15-21

And ye shall count unto you from the morrow after the sabbath, from the day that ye brought the sheaf of the wave-offering; seven sabbaths shall there be complete:

Deuteronomy 16:9-11

Seven weeks shalt thou number unto thee: from the time thou beginnest to put the sickle to the standing grain shalt thou begin to number seven weeks.

Numbers 28:18

In the first day shall be a holy convocation: ye shall do no servile work;

Acts 2:1-13

And when the day of Pentecost was now come, they were all together in one place.

1 Corinthians 15:20

But now hath Christ been raised from the dead, the firstfruits of them that are asleep.

James 1:18

Of his own will he brought us forth by the word of truth, that we should be a kind of firstfruits of his creatures.

Treasury of Scripture Knowledge

Summary

Also in the day of the firstfruits, when ye bring a new meat offering unto the LORD, after your weeks be out, ye shall have an holy convocation; ye shall do no servile work:

General references

Bible References

In the day

Exodus 23:16
and the feast of harvest, the first-fruits of thy labors, which thou sowest in the field: and the feast of ingathering, at the end of the year, when thou gatherest in thy labors out of the field.
Exodus 34:22
And thou shalt observe the feast of weeks, even of the first-fruits of wheat harvest, and the feast of ingathering at the year's end.
Leviticus 23:10
Speak unto the children of Israel, and say unto them, When ye are come into the land which I give unto you, and shall reap the harvest thereof, then ye shall bring the sheaf of the first-fruits of your harvest unto the priest:
Deuteronomy 16:9
Seven weeks shalt thou number unto thee: from the time thou beginnest to put the sickle to the standing grain shalt thou begin to number seven weeks.
Acts 2:1
And when the day of Pentecost was now come, they were all together in one place.
1 Corinthians 15:20
But now hath Christ been raised from the dead, the firstfruits of them that are asleep.
James 1:18
Of his own will he brought us forth by the word of truth, that we should be a kind of firstfruits of his creatures.

General references

Deuteronomy 16:9
Seven weeks shalt thou number unto thee: from the time thou beginnest to put the sickle to the standing grain shalt thou begin to number seven weeks.

American Standard Version Public Domain