'First born' in the Bible

When He again brings His firstborn into the world, He says, And all God’s angels must worship Him.

By faith Abraham, when he was tried, offered up Isaac: even his first-born, did he that had received the promises, offer up,

of which first-born it was said: In Isaac shall your posterity be called:

Through faith he kept the passover, and the sprinkling of blood, lest he that destroyed the firstborn should touch them.

Lest there be any fornicator, or profane person, like Esau, - who, for the sake of one meal, yielded up his own firstborn rights;

To the general assembly and church of the firstborn, which are written in heaven, and to God the Judge of all, and to the spirits of just men made perfect,