Qur'an 5:111

وَإِذْ أَوْحَيْتُ إِلَى ٱلْحَوَارِيِّـۧنَ أَنْ ءَامِنُوا۟ بِى وَبِرَسُولِى قَالُوٓا۟ ءَامَنَّا وَٱشْهَدْ بِأَنَّنَا مُسْلِمُونَ

“And [remember] when I inspired to the disciples, "Believe in Me and in My messenger [i.e., Jesus]." They said, "We have believed, so bear witness that indeed we are Muslims [in submission to Allāh]."”

Al-Maaida 5:111 · Saheeh International