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 best 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."
Hadith Referenceمسند احمد / مسند المكثرين من الصحابة / 14210
Hadith Gradingحکم دارالسلام:حديث صحيح، وهذا إسناد قوي، أبو سفيان طلحة بن نافع الواسطي صدوق لا بأس به