Genesis 21:10-12

DouayRheims(i) 10 Cast out this bondwoman and her son; for the son of the bondwoman shall not be heir with my son Isaac. 11 Abraham took this grievously for his son. 12 And God said to him: Let it not seem grievous to thee for the boy, and for thy bondwoman: in all that Sara hath said to thee, hearken to her voice: for in Isaac shall thy seed be called.