51:18
وَبِٱلْأَسْحَارِ هُمْ يَسْتَغْفِرُونَ
wabil-asḥāri hum yastaghfirūna
And in the hours before dawn they would ask forgiveness,
— Saheeh International
praying at dawn for God’s forgiveness,
— M. A. S. Abdel Haleem
And in the hours before dawn, they were (found) asking (Allâh) for forgiveness.
— Muhammad Muhsin Khan & Muhammad Taqi-ud-Din al-Hilali