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 the LORD, to do righteousness and justice; to the end that the LORD may bring on Abraham that which he has spoken of him."

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