Ma'bad bin Ka'b bin Malik narrated that his brother, Abdullah bin Ka'b bin Malik, told him that he heard Sayyiduna Abu Umamah bin Tha'labah (may Allah be pleased with him) say: We were with the Messenger of Allah (peace and blessings be upon him), and he (peace and blessings be upon him) said: "Whoever seizes the wealth of a Muslim by means of his (false) oath, Allah has made Hell obligatory for him and has forbidden Paradise to him." A man said: O Messenger of Allah, even if it is something small? the Messenger of Allah (peace and blessings be upon him) said: "Even if it is a twig of the arak tree."
Hadith Referenceالمعجم الكبير للطبراني / باب الألف / 792