Imam Al-Nawawi’s Riyad-us-Saliheen
Permissibility of Assistance without Greed
538. Salim, son of Abdullah bin `Umar, from his father Abdullah; from `Umar (May Allah be pleased with them) reported: Messenger of Allah (sallallaahu alayhi wa sallam) would give me some gift, but I would say: “Give it to someone who needs it more than I.” Thereupon he (sallallaahu alayhi wa sallam) would say, “Take it when it comes to you without begging and without greed, and add it to your property. Then use it yourself or give it away in charity. As for the rest, do not covet it.” Salim said: `Abdullah bin `Umar would never ask anything from anyone, nor would he refuse accepting it when it was given to him.
[Al-Bukhari and Muslim].