It is narrated from Sayyiduna Abdur Rahman bin Awf (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "By Him in Whose Hand is the soul of Muhammad (peace and blessings be upon him)! There are three things upon which I can swear: First, wealth does not decrease by giving charity, so give charity; second, whoever forgives an oppressor for the sake of Allah, Allah will increase his honor; and third, whoever opens the door of begging, Allah will open the door of poverty for him."
Hadith Referenceمسند احمد / مسند باقي العشرة المبشرين بالجنة / 1674
Hadith Gradingحکم دارالسلام:حسن لغيره، وهذا إسناد ضعيف لجهالة قاص أهل فلسطين ولضعف عمر بن أبى سلمة.