Surah Aali Imran (The Family of Imran), Verse 52

فَلَمَّاۤ اَحَسَّ عِیْسٰی مِنْهُمُ الْكُفْرَ قَالَ مَنْ اَنْصَارِیْۤ اِلَی اللّٰهِ قَالَ الْحَوَارِیُّوْنَ نَحْنُ اَنْصَارُ اللّٰهِ اٰمَنَّا بِاللّٰهِ وَاشْهَدْ بِاَنَّا مُسْلِمُوْنَ ۟

Falammaaa ahassa 'Eesaa minhumul kufra qaala man ansaaree ilal laahi qaalal Hawaariyyoona nahnu ansaarul laahi aamannaa billaahi washhad bi annaa muslimoon

“When Jesus found Unbelief on their part He said: "Who will be My helpers to (the work of) Allah?" Said the disciples: "We are Allah's helpers: We believe in Allah, and do thou bear witness that we are Muslims.”

Quran 3:52 (Yusuf Ali Translation)