Deuteronomy 16:9

'Seven weeks thou dost number to thee; from the beginning of the sickle among the standing corn thou dost begin to number seven weeks,

Exodus 23:16

and the Feast of Harvest, the first fruits of thy works which thou sowest in the field; and the Feast of the In-Gathering, in the outgoing of the year, in thy gathering thy works out of the field.

Exodus 34:22

'And a feast of weeks thou dost observe for thyself; first-fruits of wheat-harvest; and the feast of in-gathering, at the revolution of the year.

Acts 2:1

And in the day of the Pentecost being fulfilled, they were all with one accord at the same place,

Leviticus 23:15-16

'And ye have numbered to you from the morrow of the sabbath, from the day of your bringing in the sheaf of the wave-offering: they are seven perfect sabbaths;

Numbers 28:26-30

'And in the day of the first-fruits, in your bringing near a new present to Jehovah, in your weeks, a holy convocation ye have; ye do no servile work;

Deuteronomy 16:10

and thou hast made the feast of weeks to Jehovah thy God, a tribute of a free-will offering of thy hand, which thou dost give, as Jehovah thy God doth bless thee.

Deuteronomy 16:16

Three times in a year doth every one of thy males appear before Jehovah thy God in the place which He doth choose -- in the feast of unleavened things, and in the feast of weeks, and in the feast of booths; and they do not appear before Jehovah empty;

2 Chronicles 8:13

even by the matter of a day in its day, to cause to ascend according to the command of Moses, on sabbaths, and on new moons, and on appointed seasons, three times in a year -- in the feast of unleavened things, and in the feast of weeks, and in the feast of booths.

1 Corinthians 16:8

and I will remain in Ephesus till the Pentecost,

Hebrews 2:1

Because of this it behoveth us more abundantly to take heed to the things heard, lest we may glide aside,

Treasury of Scripture Knowledge

Summary

Seven weeks shalt thou number unto thee: begin to number the seven weeks from such time as thou beginnest to put the sickle to the corn.

Bible References

General references

Deuteronomy 16:10
and thou hast made the feast of weeks to Jehovah thy God, a tribute of a free-will offering of thy hand, which thou dost give, as Jehovah thy God doth bless thee.
Exodus 23:16
and the Feast of Harvest, the first fruits of thy works which thou sowest in the field; and the Feast of the In-Gathering, in the outgoing of the year, in thy gathering thy works out of the field.
Exodus 34:22
'And a feast of weeks thou dost observe for thyself; first-fruits of wheat-harvest; and the feast of in-gathering, at the revolution of the year.
Leviticus 23:15
'And ye have numbered to you from the morrow of the sabbath, from the day of your bringing in the sheaf of the wave-offering: they are seven perfect sabbaths;
Numbers 28:26
'And in the day of the first-fruits, in your bringing near a new present to Jehovah, in your weeks, a holy convocation ye have; ye do no servile work;
2 Chronicles 8:13
even by the matter of a day in its day, to cause to ascend according to the command of Moses, on sabbaths, and on new moons, and on appointed seasons, three times in a year -- in the feast of unleavened things, and in the feast of weeks, and in the feast of booths.
Acts 2:1
And in the day of the Pentecost being fulfilled, they were all with one accord at the same place,
1 Corinthians 16:8
and I will remain in Ephesus till the Pentecost,
Hebrews 2:1
Because of this it behoveth us more abundantly to take heed to the things heard, lest we may glide aside,