It is narrated from Hazrat Anas (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) rarely gave us any sermon in which he did not say: "He has no faith who is not trustworthy, and he has no religion who does not keep his promises."
Hadith Referenceمسند احمد / مسند المكثرين من الصحابة / 12567
Hadith Gradingحکم دارالسلام:حديث حسن، وهذا إسناد ضعيف لضعف أبى هلال الراسبي، وسلف الكلام على إسناده برقم: 12383