It is narrated from Sayyiduna Abu Umamah (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "Whoever seizes the wealth of a Muslim by means of his oath, Allah has forbidden Paradise to him and has made Hell obligatory for him." The Companions said: Even if it is something small, O Messenger of Allah? He (peace and blessings be upon him) said: "Even if it is a twig of the arak tree." He (peace and blessings be upon him) said this three times.
Hadith Referenceالمعجم الكبير للطبراني / باب الألف / 793