Surah Al-Imran, ayah 28

لَّا يَتَّخِذِ ٱلۡمُؤۡمِنُونَ ٱلۡكَٰفِرِينَ أَوۡلِيَآءَ مِن دُونِ ٱلۡمُؤۡمِنِينَۖ وَمَن يَفۡعَلۡ ذَٰلِكَ فَلَيۡسَ مِنَ ٱللَّهِ فِي شَيۡءٍ إِلَّآ أَن تَتَّقُواْ مِنۡهُمۡ تُقَىٰةٗۗ وَيُحَذِّرُكُمُ ٱللَّهُ نَفۡسَهُۥۗ وَإِلَى ٱللَّهِ ٱلۡمَصِيرُ ٢٨

Llā yattakhidhil-mu'minūnal-kāfirīna awliyā'a min dūnil-mu'minīna waman yaf'al dhālika falaysa minallāhi fī shay'in illā an tattaqū minhum tuqātan wayuhaddhirukumullāhu nafsahū wa ilallāhil-masīr

Let not believers take disbelievers as allies [i.e., supporters or protectors] rather than believers. And whoever [of you] does that has nothing [i.e., no association] with Allāh, except when taking precaution against them in prudence.¹²² And Allāh warns you of Himself, and to Allāh is the [final] destination.