It is all the same for them whether you ask forgiveness for them or do not ask forgiveness for them; never will Allah forgive them. Indeed, Allah does not guide the defiantly disobedient people.
English Transliteration
Sawaon AAalayhim astaghfarta lahum am lam tastaghfir lahum lan yaghfira Allahu lahum inna Allaha la yahdee alqawma alfasiqeena
Tafsir of Verse 6
Equal it is for them, whether thou askest forgiveness for them or thou askest not forgiveness for them; God will never forgive them. God guides not the people of the ungodly.
It is equal to them whether thou pray for their forgiveness or not. Allah will not forgive them. Truly Allah guides not rebellious transgressors.