The Prophet (peace and blessings be upon him) said:
"It may be that a person with two worn-out garments, who is paid no attention, were he to swear an oath by Allah, Allah would fulfil it."
Hadith Referenceصحیح الجامع الصغیر / حرف الراء / 3487
Hadith Gradingالألبانی:صحيح
Hadith Takhrij[البزار] عن ابن مسعود. تخريج مشكلة الفقر ١٢٥: الطحاوي، حل – أبي هريرة.