﴿ ذَٰلِكَ ٱلْفَضْلُ مِنَ ٱللَّهِ ۚ وَكَفَىٰ بِٱللَّهِ عَلِيمًۭا ﴾

“Such is the bounty of God - and none has the knowledge which God has.”

That namely their being with those mentioned dhālika ‘that’ is the subject the predicate of which is the following is bounty from God with which He has favoured them and not because they have earned it through their obedience. God suffices as Knower of the reward of the Hereafter in other words trust in what He has told you None can tell you like One Who is aware Q. 3514.