Surah At-Taubah (The Repentance), Verse 75

وَمِنْهُمْ مَّنْ عٰهَدَ اللّٰهَ لَىِٕنْ اٰتٰىنَا مِنْ فَضْلِهٖ لَنَصَّدَّقَنَّ وَلَنَكُوْنَنَّ مِنَ الصّٰلِحِیْنَ ۟

Wa minhum man 'aaha dal laaha la'in aataanaa min fadlihee lanas saddaqanna wa lanakoonanna minassaaliheen

“Amongst them are men who made a covenant with Allah, that if He bestowed on them of His bounty, they would give (largely) in charity, and be truly amongst those who are righteous.”

Quran 9:75 (Yusuf Ali Translation)