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 was written in the law of the Lord; That every male opening the womb shall be called holy to the Lord;
Hebrews 12:23
to the whole company, and to the church of the first-born, who have been written in the heavens, and to God the Judge of all, and to the spirits of justified people who have been made perfect,