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 through a false oath, Allah Almighty has made Paradise forbidden for him and has made Hell obligatory for him." The Companions (may Allah be pleased with them) asked: Even if it is a small thing? He (peace and blessings be upon him) said: "Even if it is a twig of the miswak tree." He said this three times.
Hadith Referenceالسنن المأثورة / باب ما جاء في فدية الأذى / 517
Hadith Takhrijصحیح مسلم، الایمان، باب وعيد من اقتطع حق مسلم ...... الخ، رقم: 137