It is narrated from Hazrat Muawiyah (may Allah be pleased with him) that when something was brought to the Prophet (peace and blessings be upon him), he would ask about it: "Is this a gift or charity?" If people said it was a gift, the Prophet (peace and blessings be upon him) would extend his hand towards it, and if people said it was charity, he would say to his companions, "You take it."
Hadith Referenceمسند احمد / أول مسند البصريين / 20054
Hadith Gradingحکم دارالسلام:صحيح لغيره، وهذا إسناد حسن