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
in fulfilment of the requirement of the Law of the Lord, "Every first-born male shall be considered consecrated to the Lord,"
Hebrews 12:23
to the solemn gathering of all God's elder sons, enrolled as citizens in heaven, to a judge who is the God of all, to the spirits of upright men now at last enjoying the fulfilment of their hopes,