Acts 2:1

And when the day of Pentecost had fully come, they were all with one consent in one place.

1 Corinthians 16:8

But I will continue in Ephesus till Pentecost:

Hebrews 2:1

Therefore, we ought to give the more earnest heed to the things which we have heard, lest we let them glide away.

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
And when the day of Pentecost had fully come, they were all with one consent in one place.
1 Corinthians 16:8
But I will continue in Ephesus till Pentecost:
Hebrews 2:1
Therefore, we ought to give the more earnest heed to the things which we have heard, lest we let them glide away.