وَقُل رَّبِّ ٱغْفِرْ وَٱرْحَمْ وَأَنتَ خَيْرُ ٱلرَّٰحِمِينَ
Waqul rabbi ighfir wa i r h am waanta khayru a l rr ah imeen a Hence, [O believer,] say: "O my Sustainer! Grant [me] forgiveness and bestow Thy mercy [upon mel: for Thou art the truest bestower of mercy!"
 - Mohammad Asad
Say: "O Rabb, forgive, have Mercy, You are the Best of those who show mercy!"
 - Muhammad Farooq-i-Azam Malik
Say, 'O Prophet,' 'My Lord! Forgive and have mercy, for You are the best of those who show mercy.'
 - Mustafa Khattab
And (O Muhammad) say: My Lord! Forgive and have mercy, for Thou art best of all who show mercy.
 - Marmaduke Pickthall
So say: "O my Lord! grant thou forgiveness and mercy! for Thou art the Best of those who show mercy!"
 - Abdullah Yusuf Ali