It is narrated from Sayyiduna Ibn Umar (may Allah be pleased with them both) that the very first charity in Islam was that which Sayyiduna Umar (may Allah be pleased with him) gave, and the Noble Prophet (peace and blessings be upon him) said to him: "Keep its original property with you and give its profits in charity."
Hadith Referenceمسند احمد / مسند المكثرين من الصحابة / 6460
Hadith Gradingحکم دارالسلام:حديث صحيح، وهذا إسناد ضعيف لضعف عبد الله العمري