Genesis 17:27

All the men of his house, those born in the house, and those bought with money of a foreigner, were circumcised with him.

Genesis 18:19

For I have known him, to the end that he may command his children and his household after him, that they may keep the way of Yahweh, to do righteousness and justice; to the end that Yahweh may bring on Abraham that which he has spoken of him."

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