Surah An-Najm 53:7

وَهُوَ بِٱلْأُفُقِ ٱلْأَعْلَىٰ

While he was in the higher [part of the] horizon.

Translation: Saheeh International

Tafsir

when he was on the highest horizon the horizon of the sun that is to say at the place from which it rises in the form in which he Gabriel was created so that the Prophet s saw him; he the Prophet had been at Mount Hirā’ where Gabriel had obscured the entire horizon to the west. …

Excerpt from Tafsir al-Jalalayn, commentary on 53:7, via Quran.com. The reader has the full commentary and 9 more tafsirs.