Genesi 17:12

And he that is eight days old shall be circumcised among you, every man child in your generations, he that is born in the house, or bought with money of any stranger, which [is] not of thy seed.

Ver. 12. And he that is eight days old.] This warrants our baptizing of infants of both sexes. See Trapp on " Gen 9:10 " (Great leap of logic here! Editor.)