In Exodus 20:21, God dwells in thick darkness, showing darkness is no barrier to His presence — paralleling Psalm 139:12.

In Job 26:6, Sheol and Abaddon are uncovered before God, reinforcing that even the darkest depths are fully seen by Him.

In Job 34:22, Elihu states no darkness can hide evildoers from God — a direct thematic echo of Psalm 139:12.

In Daniel 2:22, Daniel declares God reveals deep things and knows what is in darkness — closely paralleling Psalm 139:12.

In Job 12:22, God reveals deep darkness and brings shadows to light, directly mirroring Psalm 139:12's message.

In Job 22:14, Eliphaz wrongly claims clouds veil God's sight — a stark contrast to Psalm 139:12's truth that darkness is as light to God.

In Hebrews 4:13, all creatures are naked and exposed to God's sight, extending the theme of no hiding from God beyond literal darkness.

In Matthew 6:4, this truth about God seeing in secret is applied to giving — the Father who sees in secret rewards.