وَقُل رَّبِّ ٱغْفِرْ وَٱرْحَمْ وَأَنتَ خَيْرُ ٱلرَّٰحِمِينَ
waqul rabbi igh'fir wa-ir'ḥam wa-anta khayru l-rāḥimīna
And, [O Muḥammad], say, "My Lord, forgive and have mercy, and You are the best of the merciful."
— Saheeh International
Say [Prophet], ‘Lord, forgive and have mercy: You are the most merciful of all.’
— M. A. S. Abdel Haleem
And say (O Muhammad صلى الله عليه وسلم): "My Lord! Forgive and have mercy, for You are the Best of those who show mercy!"
— Muhammad Muhsin Khan & Muhammad Taqi-ud-Din al-Hilali

