Surah Adh-Dhariyat 51:28

فَأَوْجَسَ مِنْهُمْ خِيفَةً ۖ قَالُوا۟ لَا تَخَفْ ۖ وَبَشَّرُوهُ بِغُلَـٰمٍ عَلِيمٍ

And he felt from them apprehension. They said, "Fear not," and gave him good tidings of a learned boy.

Translation: Saheeh International

Tafsir

Then he conceived he kept secret in himself a fear of them. They said ‘Do not be afraid!’ we are messengers from your Lord. And they gave him good tidings of the birth of a knowledgeable boy one endowed with much knowledge and this was Isaac as mentioned in sūrat Hūd Q. 1171.

Excerpt from Tafsir al-Jalalayn, commentary on 51:28, via Quran.com. The reader has the full commentary and 9 more tafsirs.