The Quran

وَالمُؤمِنونَ وَالمُؤمِناتُ بَعضُهُم أَولِياءُ بَعضٍ ۚ يَأمُرونَ بِالمَعروفِ وَيَنهَونَ عَنِ المُنكَرِ وَيُقيمونَ الصَّلاةَ وَيُؤتونَ الزَّكاةَ وَيُطيعونَ اللَّهَ وَرَسولَهُ ۚ أُولٰئِكَ سَيَرحَمُهُمُ اللَّهُ ۗ إِنَّ اللَّهَ عَزيزٌ حَكيمٌ

Muhammad Asad

AND [as for] the believers, both men and women - they are close unto one another:¹ they [all] enjoin the doing of what is right and forbid the doing of what is wrong, and are constant in prayer, and render the purifying dues, and pay heed unto God and His Apostle. It is they upon whom God will bestow His grace: verily, God is almighty, wise!

Or: "are the protectors [or "friends and protectors"] of one another". Since, however, the believers are here contrasted with the hypocrites, spoken of in verse 67 as being "all of a kind", it is preferable to render the term wali (of which awliya' is the plural) in its primary meaning of being "near" or "close" to one another.