And in the middle of the fifth month he moved from thence, and dwelt at the Well of the Oath.
And in the middle of the sixth month the Lord visited Sarah and did unto her as He had spoken.
And she conceived and bare a son in the third month, and in the middle of the month, at the time of which the Lord had spoken to Abraham,
on the festival of the first-fruits of the harvest, Isaac was born. And Abraham circumcised his son on the eighth day:
he was the first that was circumcised according to the covenant which is ordained for ever.