Parallel
Isaiah 48:4
Rahlfs Septuagint (1935) · Berean Standard Bible
γινώσκω ἐγὼ ὅτι σκληρὸς εἶ καὶ νεῦρον σιδηροῦν ὁ τράχηλός σου καὶ τὸ μέτωπόν σου χαλκοῦν
For I knew that you are stubborn; your neck is iron and your forehead is bronze.