Abu Zubair says that he asked Sayyiduna Jabir (may Allah be pleased with him) whether the Prophet (peace and blessings be upon him) said that the best jihad is that of the person whose horse’s legs are cut and his own blood is shed. He replied: Yes.
Hadith Referenceمسند احمد / مسند المكثرين من الصحابة / 14727
Hadith Gradingحکم دارالسلام:حديث صحيح، وهذا إسناد ضعيف من أجل ابن لهيعة