Abdur Rahman bin Harmala عبد الرحمن بن حرملة بن عمرو بن سنة · The Book on Virtues of Jihad

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." This Hadith has been reported from Mu'awiyah bin Salih in Mursal form.And Zaid has been contradicted concerning part of its chain. He said: And Al-Walim bin Jamil has reported this Hadith from Al-Qasim Abu 'Abdur-Rahman, from Abu Umamah, from the Prophet (ﷺ).