ʿUmar bin al Khattab ؓ appointed me in charge of the zakah, and when had finished with it and handed it over to him, he ordered that I be given some remuneration. I said: I only did it for the sake of Allah and my reward is with Allah. He said: Take what is given to you. I was appointed to do some work at the time of the Messenger of Allah ﷺ and he gave me some remuneration, and I said the same as you have said, but the Messenger of Allah ﷺ said to me: ʿIf you are given something without asking for it, then take it and give some in charity.”
خُذْ مَا أُعْطِيتَ فَإِنِّي قَدْ عَمِلْتُ عَلَى عَهْدِ رَسُولِ اللهِ ﷺ فَعَمَّلَنِي فَقُلْتُ مِثْلَ قَوْلِكَ فَقَالَ لِي رَسُولُ اللهِ ﷺ إِذَا أُعْطِيتَ شَيْئًا مِنْ غَيْرِ أَنْ تَسْأَلَ فَكُلْ وَتَصَدَّقْ