Translation:

6. It is equal to them whether thou pray for their forgiveness or not. Allah will not forgive them. Truly Allah guides not rebellious transgressors.

Notes (Tafseer)

5473. The stiff-necked rejecters of Allah's Truth have made a wide gulf between themselves and Allah's Grace. No prayer for them will help them. In the attitude of rebellion and transgression they cannot obtain Allah's forgiveness.