Mujahid (may Allah have mercy on him) says: When I set out for jihad, Abdullah bin Umar (may Allah be pleased with them both) bade us farewell. When he was about to go back, he said: I have nothing with me that I could give you, but I heard the Messenger of Allah (peace and blessings be upon him) say: "Allah, the Lord of Might, protects whatever is entrusted to His protection." I entrust your religion, your trusts and the final outcomes of your deeds to Allah.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب السير / 18577
Sahl bin Mu'adh bin Anas narrates from his father (may Allah be pleased with him), who narrates from the Messenger of Allah (peace and blessings be upon him), that he (peace and blessings be upon him) said: "That I should stay with the fighters and guard their caravan in the morning or in the evening is dearer to me than everything in the world."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب السير / 18578
Sa'id bin Jabir narrates from his father that Sayyiduna Abu Bakr al-Siddiq (may Allah be pleased with him), while bidding farewell to an army, walked with them and said: All praise is for the One who has made our feet dusty in His path. It was said to him: How have our feet become dusty in the path of Allah, when we have only seen them off? He said: We equipped them, saw them off and prayed for them.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب السير / 18579