she
Exodus 13:2
'Sanctify to Me every first-born, opening any womb among the sons of Israel, among man and among beast; it [is] Mine.'
Exodus 22:29
'Thy fulness and thy liquids thou dost not delay; the first-born of thy sons thou dost give to Me;
Luke 2:7
and she brought forth her son -- the first-born, and wrapped him up, and laid him down in the manger, because there was not for them a place in the guest-chamber.
Romans 8:29
because whom He did foreknow, He also did fore-appoint, conformed to the image of His Son, that he might be first-born among many brethren;
and he
Luke 2:21
And when eight days were fulfilled to circumcise the child, then was his name called Jesus, having been so called by the messenger before his being conceived in the womb.