Exodus 7:13 records the first instance of Pharaoh’s heart being hardened, directly grounding the example cited in 1 Samuel.

Exodus 8:15 shows Pharaoh hardening his heart after respite, another specific episode that matches the pattern described.

Exodus 9:34 reports Pharaoh hardening his heart again after the hail ceased, continuing the cycle of rebellion referenced.

Exodus 10:3 records God’s plea for humility before Pharaoh, contrasting the hardness later recalled in 1 Samuel.

Exodus 12:31-33 records Pharaoh finally letting Israel go — the very event 1 Samuel 6:6 references as proof that stubbornness leads to release.

Exodus 14:17 shows God hardening the Egyptians’ hearts for the final pursuit, the climactic result of the pattern mentioned.

Job 9:4 asks who has hardened himself against God and succeeded—mirrors the warning not to harden hearts like Pharaoh.

Exodus 11:10 states God hardened Pharaoh's heart so he would not let Israel go — the background to the warning in 1 Samuel 6:6 against hardening like Pharaoh.

Hebrews 3:8 quotes Psalm 95 warning 'Do not harden your hearts' — the same exhortation applied to believers, echoing the warning to the Philistines.

Romans 2:5 describes a hard and impenitent heart storing up wrath—a similar consequence of stubbornness, though focused on personal judgment.

Psalm 95:8 warns against hardening hearts like Israel at Meribah, echoing the same imagery but applied to a different rebellion in the wilderness.

Daniel 5:20 shows Nebuchadnezzar's heart hardened in pride leading to his downfall — another biblical example of the same pattern warned against in 1 Samuel 6:6.

Hebrews 3:13 warns against being hardened by sin’s deceit, offering a preventive perspective on the same spiritual danger.