And they circumcised him upon the eighth day and from that time the Jews continue the custom of circumcising their sons within that number of days.

But as for the Arabians, they circumcise after the thirteenth year, because Ismael, the founder of their nation, who was born to Abraham of the concubine, was circumcised at that age; concerning whom I will presently give a particular account, with great exactness.
3.

As for Sarah, she at first loved Ismael, who was born of her own handmaid Hagar, with an affection not inferior to that of her own son, for he was brought up in order to succeed in the government; but when she herself had borne Isaac, she was not willing that Ismael should be brought up with him, as being too old for him, and able to do him injuries when their father should be dead; she therefore persuaded Abraham to send him and his mother to some distant country.

Now, at the first, he did not agree to what Sarah was so zealous for, and thought it an instance of the greatest barbarity, to send away a young child [26] and a woman unprovided of necessaries; but at length he agreed to it, because God was pleased with what Sarah had determined: so he delivered Ismael to his mother, as not yet able to go by himself; and commanded her to take a bottle of water, and a loaf of bread, and so to depart, and to take Necessity for her guide.

But as soon as her necessary provisions failed, she found herself in an evil case; and when the water was almost spent, she laid the young child, who was ready to expire, under a fig-tree, and went on further, that so he might die while she was absent.