Sayyiduna Amr bin al-As (may Allah be pleased with him) narrates: The Prophet Muhammad (peace and blessings be upon him) said: "O Amr! Fasten your weapons and clothes upon yourself." The narrator says: I did so, then I presented myself before the Prophet (peace and blessings be upon him), and I found him performing ablution. The Prophet (peace and blessings be upon him) raised his head and looked me up and down. The Prophet (peace and blessings be upon him) said: "O Amr! I want to send you on a mission. May Allah keep you safe and grant you spoils of war, and I will also give you a share from the spoils." The narrator says: I said, "O Messenger of Allah (peace and blessings be upon him)! I did not accept Islam out of interest in wealth; rather, I accepted Islam to participate in jihad and to be with you." The Prophet (peace and blessings be upon him) said: "O Amr! Wealth is very good when it is pure and in the hands of a righteous man."
Hadith Referenceصحیح ابن حبان / كتاب الزكاة / 3211
Hadith Gradingفضيلة الشيخ الإمام محمد ناصر الدين الألبانيصحيح - انظر ما قبله.فضيلة الشيخ العلّامة شُعيب الأرناؤوطإسناده قوي