Part 1, 12. Chorus. "For unto us a child is born"

Whose song is Part 1, 12. Chorus. "For unto us a child is born"?

Artist Album
Neville Marriner - Academy & Chorus of St.Martin-in-the-Fields
Handel: Messiah, 1743 London version [Disc 1]
Sir Neville Marriner; Academy & Chorus of St.Martin-in-the-...
Handel - Messiah