Romans 8:29

Because whom he did foreknow, he did also predestinate to be conformed to the image of his Son, in order that he might be the firstborn among many brethren:

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,

Treasury of Scripture Knowledge

Summary

Now the sons of Caleb the brother of Jerahmeel were, Mesha his firstborn, which was the father of Ziph; and the sons of Mareshah the father of Hebron.

His first-born

Bible References

His first-born

Romans 8:29
Because whom he did foreknow, he did also predestinate to be conformed to the image of his Son, in order that he might be the firstborn among many brethren:
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,