Proverbs 23:12
Apply thine heart unto instruction, and thine ears to the words of knowledge.
Cross-reference
Proverbs 23:19 echoes the call to hear and direct your heart — a parallel exhortation to pursue wisdom.
Proverbs 2:2-6 expands on inclining ear and heart to wisdom, promising understanding and knowledge of God.
Proverbs 5:1 uses nearly identical language — 'incline your ear to my understanding' — reinforcing the command to listen.
Proverbs 5:2 gives the purpose: that you may keep discretion — the outcome of applying heart to instruction.
Proverbs 22:17 almost verbatim repeats the same command to incline your ear and apply your heart.
Ezekiel 33:31 describes people who hear but do not apply heart — the opposite of this verse's command.
James 1:21-25 calls for being doers of the word, not hearers only — directly applying this command to receive instruction.
Psalm 90:12 asks for a heart of wisdom by numbering days — a related plea for instruction leading to wisdom.
Matthew 13:52 depicts a scribe trained for the kingdom bringing out treasures — the result of applying heart to instruction.