لِّئَلَّا يَعْلَمَ أَهْلُ ٱلْكِتَـٰبِ أَلَّا يَقْدِرُونَ عَلَىٰ شَىْءٍ مِّن فَضْلِ ٱللَّهِ ۙ وَأَنَّ ٱلْفَضْلَ بِيَدِ ٱللَّهِ يُؤْتِيهِ مَن يَشَآءُ ۚ وَٱللَّهُ ذُو ٱلْفَضْلِ ٱلْعَظِيمِ
Li'alla ya'lama Ahlul kitaabi allaa yaqdiroona 'alaa shai'im min fadlil laahi wa annal fadla bi Yadil laahi u'teehi many yashaaa'; wallaahu Zul fadilil 'azeem
The People of the Book should know that they have no power over any of God’s grace and that grace is in the hand of God alone: He gives it to whoever He will. God’s grace is truly immense.
So that the People of the Book may know that they have no power over any of God's grace, and that grace is in God's hand — he grants it to whom he wills. And God is the possessor of immense grace.