Hebrews 6:16-18 expands on God's oath to confirm the promise — the same divine guarantee introduced in 6:13.

Genesis 22:15-18 records God's oath to Abraham after the binding of Isaac — the very promise referenced in 6:13.

Psalm 105:9 recalls God's covenant with Abraham and his sworn promise — the same oath referenced in 6:13.

Micah 7:20 directly references God's sworn faithfulness to Abraham and Jacob, affirming the covenant oath Hebrews mentions.

Luke 1:73 explicitly mentions 'the oath he swore to our father Abraham', the same event underlying Hebrews' argument.

Genesis 22:16 is the direct source: God swears by himself to Abraham after the binding of Isaac, exactly what Hebrews summarizes.

Exodus 32:13 records Moses reminding God that he swore by himself to multiply Abraham's offspring, reinforcing the oath.

1 Chronicles 16:16 directly names the covenant and sworn promise to Abraham and Isaac, echoing the same divine oath as Hebrews 6:13.

Psalm 110:4 records God's irrevocable oath about Melchizedek's priesthood—another divine oath that Hebrews later ties to Christ.

Jeremiah 51:14 explicitly states 'The Lord has sworn by himself', directly paralleling the oath formula in Hebrews 6:13.

Amos 6:8 says 'The Lord God has sworn by himself', a direct parallel to the oath in Hebrews 6:13.

Deuteronomy 7:8 cites the oath to the fathers as the basis for God's redemption, connecting to the same promise.

Psalm 89:35 shows God swearing by his holiness (by himself) regarding David, paralleling the divine self-oath in Hebrews 6:13.

Deuteronomy 26:15 invokes the same oath to the fathers as the basis for God's blessing on the land, reinforcing the promise's foundation.

Deuteronomy 28:9 recalls God's conditional oath to make Israel holy, showing the covenantal context of the Abrahamic promise.

Ezekiel 5:11 uses 'as I live' — God swears by His own life, a parallel to swearing by Himself as in Hebrews 6:13.