Matthew 13:44 illustrates the same teaching: a man sells everything for the treasure — showing where his heart truly is.

Matthew 12:34 teaches that the mouth speaks what the heart is full of—linking heart's content to actions, similar to treasure directing heart.

Jeremiah 22:17 depicts a heart set on dishonest gain—a concrete example of earthly treasure consuming the heart, as described in Matthew.

Luke 12:34 repeats Jesus' same saying verbatim—confirming this principle about treasure and heart across Gospels.

2 Corinthians 4:18 expands the idea: focusing on unseen eternal things aligns with storing treasures in heaven, as the heart follows.

Colossians 3:1-3 expands on the same principle: set your heart on heavenly treasures, not earthly ones — a direct application of Matthew 6:21.

Proverbs 4:23 commands guarding the heart because life flows from it—reinforcing Matthew's point that heart's focus is vital.

Jeremiah 4:14 calls for washing the heart of evil—showing that heart's condition must be aligned with God, as treasure determines heart.

Hebrews 3:12 warns against an unbelieving heart that turns away — echoing the principle that heart direction determines spiritual state.