Mukhtasar Muslim

Narrated from Sayyiduna Abu Hurairah (may Allah be pleased with him) that the Messenger of Allah (peace and blessings of Allah be upon him) said: There are many people who are dusty and disheveled, driven away from doors, (but) if they swear by Allah relying on Him, Allah fulfills their oath (that is, they are accepted by Allah even though they are insignificant in the eyes of the worldly people).