Acts 2:1

At length, on the day of the Harvest Festival, they had all met in one place;

1 Corinthians 16:8

I shall remain in Ephesus, however, until the time of the Harvest Festival,

Hebrews 2:1

For this reason we ought to pay the more earnest heed to the things which we have heard, for fear we should drift away from them.

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

Acts 2:1
At length, on the day of the Harvest Festival, they had all met in one place;
1 Corinthians 16:8
I shall remain in Ephesus, however, until the time of the Harvest Festival,
Hebrews 2:1
For this reason we ought to pay the more earnest heed to the things which we have heard, for fear we should drift away from them.