Surah Al-Baqarah — Ayah 270 (2:270)
وَمَآ أَنفَقۡتُم مِّن نَّفَقَةٍ أَوۡ نَذَرۡتُم مِّن نَّذۡرٖ فَإِنَّ ٱللَّهَ يَعۡلَمُهُۥۗ وَمَا لِلظَّٰلِمِينَ مِنۡ أَنصَارٍ ٢٧٠
English translation (Saheeh International)
And whatever you spend of expenditures or make of vows - indeed, Allāh knows of it. And for the wrongdoers there are no helpers.
Brief commentary
Whatever you spend, no matter how little, for the pleasure of Allah, or any action that you promise to do for Allah without having been required to do it, Allah knows of it and it will not be lost. He will give you a great reward for it. Those who do wrong by not fulfilling their obligations and overstepping Allah’s limits have no one to protect them against the punishment on the Day of Resurrection.