إِنَّمَا وَلِيُّكُمُ ٱللَّهُ وَرَسُولُهُۥ وَٱلَّذِينَ ءَامَنُوا۟ ٱلَّذِينَ يُقِيمُونَ ٱلصَّلَوٰةَ وَيُؤْتُونَ ٱلزَّكَوٰةَ وَهُمْ رَٰكِعُونَ
“Your only guardians are Allah, His Messenger, and fellow believers — who establish prayer and pay zakat with humility.”
Part of the same passage (Q5:52-56) following the warning against untrustworthy allies, in the context of Banu Qaynuqa's expulsion described at this event.