It is narrated from Sayyiduna Jabir (may Allah be pleased with him) that some people asked the Prophet (peace and blessings be upon him): "Which is the most virtuous jihad?" The Prophet (peace and blessings be upon him) said: "That of the person whose horse's legs are cut and his own blood is shed." And someone asked the Prophet (peace and blessings be upon him): "Which prayer is the most virtuous?" The Prophet (peace and blessings be upon him) said: "The long prayer."
Hadith Referenceمسند احمد / مسند المكثرين من الصحابة / 14233