That he asked the Messenger of Allah ﷺ, "Which charity is most virtuous?" He said, "The service of a worshipper in the cause of Allah, or providing the shade of tent, or mount in the cause of Allah." (Using translation from Tirmidhī 1626)
أَنَّهُ سَأَلَ رَسُولَ اللَّهِ ﷺ أَيُّ الصَّدَقَةِ أَفْضَلُ؟ قَالَ «خِدْمَةُ عَبْدٍ أَوْ ظِلُّ فُسْطَاطٍ أَوْ طَرُوقَةُ فَحْلٍ فِي سَبِيلِ اللَّهِ»