عَلَّمَهُ الْبَيَانَ
[and] taught him articulate speech.
Agha Ali Puya Commentary
Commentary on Quran 55:4
[Pooya/Ali Commentary 55:4] (see commentary for verse 3)
The Beneficent
55. Ar-Raḥmān
الرحمن
al-Raḥmān (The All-beneficent)
ٱلرَّحْمَٰن
55:4
ʿallamahu l-bayāna
[and] taught him articulate speech.