[This is] so that the People of the Scripture may know that they are not able [to obtain] anything from the bounty of Allah and that [all] bounty is in the hand of Allah; He gives it to whom He wills. And Allah is the possessor of great bounty.
The Saheeh International Quran Translation
لِّئَلَّا يَعْلَمَ أَهْلُ ٱلْكِتَٰبِ أَلَّا يَقْدِرُونَ عَلَىٰ شَىْءٍ مِّن فَضْلِ ٱللَّهِ وَأَنَّ ٱلْفَضْلَ بِيَدِ ٱللَّهِ يُؤْتِيهِ مَن يَشَآءُ وَٱللَّهُ ذُو ٱلْفَضْلِ ٱلْعَظِيمِ[This is] so that the People of the Scripture may know that they are not able [to obtain] anything from the bounty of Allah and that [all] bounty is in the hand of Allah; He gives it to whom He wills. And Allah is the possessor of great bounty.