12 Apply thy heart unto instruction, and thy ears to the sayings of knowledge.
Proverbs 23:12 Cross References - Leeser
Proverbs 2:2-6
2 To let thy ear listen unto wisdom: if thou wouldst incline thy heart to understanding.
3 For if thou wilt call after intelligence; if after understanding thou wilt lift up thy voice;
4 If thou wilt seek her as silver, and search for her as for hidden treasures:
5 Then wilt thou understand the fear of the Lord, and the knowledge of God wilt thou find.
6 For the Lord giveth wisdom: out of his mouth come knowledge and understanding.
Proverbs 5:1-2
Proverbs 22:17
17 Incline thy ear, and hear the words of the wise, and apply thy heart unto my knowledge.
Proverbs 23:19
19 Hear thou, my son, and become wise, and guide thy heart on the right way.
Ezekiel 33:31
31 And then they come unto thee as the people come, and they sit before thee as my people, and they hear thy words, but do not execute them; for as merry songs they carry them in their mouth, while their heart goeth after their unlawful gains.