Surah As-Saf (The Solid Ranks), Verse 14

یٰۤاَیُّهَا الَّذِیْنَ اٰمَنُوْا كُوْنُوْۤا اَنْصَارَ اللّٰهِ كَمَا قَالَ عِیْسَی ابْنُ مَرْیَمَ لِلْحَوَارِیّٖنَ مَنْ اَنْصَارِیْۤ اِلَی اللّٰهِ قَالَ الْحَوَارِیُّوْنَ نَحْنُ اَنْصَارُ اللّٰهِ فَاٰمَنَتْ طَّآىِٕفَةٌ مِّنْ بَنِیْۤ اِسْرَآءِیْلَ وَكَفَرَتْ طَّآىِٕفَةٌ فَاَیَّدْنَا الَّذِیْنَ اٰمَنُوْا عَلٰی عَدُوِّهِمْ فَاَصْبَحُوْا ظٰهِرِیْنَ 

Yaaa ayyuhal lazeena aamanoo koonooo ansaaral laahi kamaa qaala 'Eesab-nu-Maryama lil Hawaariyyeena man ansaareee ilal laah; qaalal Hawaariyyoona nahnu ansaa rul laahi fa aamanat taaa'ifatum mim Banee Israaa'eela wa kafarat taaa'ifatun fa ayyadnal lazeena aamanoo 'alaa 'aduwwihim fa asbahoo zaahireen

“O ye who believe! Be ye helpers of Allah: As said Jesus the son of Mary to the Disciples, "Who will be my helpers to (the work of) Allah?" Said the disciples, "We are Allah's helpers!" then a portion of the Children of Israel believed, and a portion disbelieved: But We gave power to those who believed, against their enemies, and they became the ones that prevailed.”

Quran 61:14 (Yusuf Ali Translation)