Sayyiduna Jabalah bin Harithah (may Allah be pleased with him) said: When the Prophet (peace and blessings be upon him) did not go out on a military expedition himself, he would give his weapons to Sayyiduna Ali or Sayyiduna Usamah (may Allah be pleased with them both).
Hadith Referenceالمعجم الكبير للطبراني / باب الجيم / 2181