It is narrated from Sayyiduna Adi bin Hatim al-Ta'i (may Allah be pleased with him) that he asked the Messenger of Allah (peace and blessings be upon him): Which charity is the best? He (peace and blessings be upon him) said: "Providing the service of a servant in the way of Allah, or providing the shade of a tent (for the mujahidin), or giving a young male camel fit for breeding in the way of Allah (for breeding or riding)." This hadith has a sahih (authentic) chain of narration, but the two Shaykhs (Bukhari and Muslim) did not record it.