Surah Al-Insan 76:26

وَمِنَ ٱلَّيْلِ فَٱسْجُدْ لَهُۥ وَسَبِّحْهُ لَيْلًا طَوِيلًا

And during the night prostrate to Him and exalt [i.e., praise] Him a long [part of the] night.

Translation: Saheeh International

Tafsir

and prostrate to Him for a portion of the night that is at after sunset maghrib and at night ‘ishā’ and glorify Him the length of the night perform supererogatory prayers during it as mentioned above for either two thirds a half or a third of it.

Excerpt from Tafsir al-Jalalayn, commentary on 76:26, via Quran.com. The reader has the full commentary and 9 more tafsirs.