Acts 2:1

And, when the day of Pentecost was being fulfilled they were all together in one place;

1 Corinthians 16:8

But I will remain at Ephesus until the Pentecost;

Hebrews 2:1

For this reason, it is needful that we give the more earnest heed to the things heard, lest at any time we drift past 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
And, when the day of Pentecost was being fulfilled they were all together in one place;
1 Corinthians 16:8
But I will remain at Ephesus until the Pentecost;
Hebrews 2:1
For this reason, it is needful that we give the more earnest heed to the things heard, lest at any time we drift past them.