Markus 4:9

4:9 And he said, “Whoever has ears to hear had better listen!” ¹ 

Markus 8:18

8:18 Though you have eyes, don’t you see? And though you have ears, can’t you hear? ²  Don’t you remember?

[4:9]  ¹ tn The translation “had better listen!” captures the force of the third person imperative more effectively than the traditional “let him hear,” which sounds more like a permissive than an imperative to the modern English reader. This was Jesus’ common expression to listen and heed carefully (cf. Matt 11:15; 13:9, 43; Mark 4:23; Luke 8:8, 14:35).

[8:18]  ² tn Grk “do you not hear?”