Treasury of Scripture Knowledge

Summary

Because all the firstborn are mine; for on the day that I smote all the firstborn in the land of Egypt I hallowed unto me all the firstborn in Israel, both man and beast: mine shall they be: I am the LORD.

Bible References

Because

Luke 2:23
(as it is written in the law of the Lord, "Every male who opens the womb shall be called holy to the Lord"),
Hebrews 12:23
and church of the firstborn who are enrolled in heaven, and to God, the Judge of all, and to the spirits of righteous men made perfect,