Zayd bin Aslam (may Allah have mercy on him) narrates from his father that there was a man from Syria to whom Sayyiduna Umar (may Allah be pleased with him) said: "Why do the people of Syria love you?" He said: "I go out on military expeditions with them and I keep up fellowship and sympathy (muwasah) with them." Sayyiduna Umar (may Allah be pleased with him) gave him ten thousand and said: "Take them and use them to help yourself in your expeditions." He said: "I have no need of them." Sayyiduna Umar (may Allah be pleased with him) said: "The Messenger of Allah (peace and blessings be upon him) gave me wealth other than what I have given you, and I said to him the same as you said to me. He (peace and blessings be upon him) said: 'When Allah gives you wealth that you did not ask for and that your heart was not eager for, accept it, for it is only provision that Allah has given you.'"
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الهبات / 12042