Genesis 20:14 shows the kindness Abimelech refers to — returning Sarah and giving Abraham livestock and servants — the basis for his oath request.

In Genesis 24:3, Abraham again uses solemn oath-taking under God's name, this time with his servant regarding Isaac — showing the weight he places on sworn agreements.

In Genesis 26:28, Abimelech's son makes the same request of Isaac after seeing God is with him — the oath pattern repeating across generations with the same people.

In Genesis 26:31, Isaac repeats this same pattern — swearing an oath with Abimelech to secure peaceful relations, echoing his father's covenant.

In Genesis 14:23, Abraham previously refused to profit from foreign kings — his oath here with Abimelech continues his pattern of integrity with outsiders.

In Genesis 31:44, Laban proposes a covenant as witness — a sworn agreement between two parties, parallel to Abraham and Abimelech's mutual oath here.

In Genesis 31:53, Jacob and Laban swear a covenant oath by invoking God, echoing Abimelech's request for Abraham to swear by God regarding their relationship.

In Joshua 2:12, Rahab uses nearly identical language — asking the spies to swear by the Lord to deal kindly with her family, just as Abimelech asked here.

In 1 Samuel 20:42, Jonathan's farewell explicitly mentions offspring in their sworn oath — the same concern for descendants' welfare that Abimelech raises here.

In 1 Samuel 24:21, Saul asks David to swear by the Lord not to cut off his offspring — closely mirroring Abimelech's request about offspring here.

Hebrews 6:16 explains the practice on display here: people swear by someone greater to confirm matters and settle disputes.