12 Apply your heart to instruction, and prepare your ears for words of discretion.
Proverbs 23:12 Cross References - LXX2012
Proverbs 2:2-6
2 your ear shall listen to wisdom; you shall also apply your heart to understanding, and shall apply it to the instruction of your son.
3 For it you shall call to wisdom, and utter your voice for understanding;
4 and if you shall seek it as silver, and search diligently for it as for treasures;
5 then shall you understand the fear of the Lord, and find the knowledge of God.
6 For the Lord gives wisdom; and from his presence [come] knowledge and understanding,
Proverbs 5:1-2
Proverbs 22:17
17 Incline your ear to the words of wise men: hear also my word, and apply your heart,
Proverbs 23:19
19 Hear, [my] son, and be wise, and rightly direct the thoughts of your heart.
Ezekiel 33:31
31 They approach you as a people comes together, and sit before you, and hear your words, but they will not do them: for [there is] falsehood in their mouth, and their heart [goes] after their pollutions.