Parallel
Hebrews 5:11
Patriarchal Greek New Testament (1904) · Berean Standard Bible
Περὶ οὗ πολὺς ἡμῖν ὁ λόγος καὶ δυσερμήνευτος λέγειν, ἐπεὶ νωθροὶ γεγόνατε ταῖς ἀκοαῖς.
We have much to say about this, but it is hard to explain, because you are dull of hearing.