Musnad Ahmad — Hadith 24009/57

Narrated to us by Ishaq ibn Isa, who informed me from Malik, from Al-Ala’, from Ma’bad ibn Ka’b ibn Malik, from his brother Abdullah ibn Ka’b, from Abu Umamah, that the Messenger of Allah, peace and blessings be upon him, said: “Whoever seizes the right of a Muslim by his oath, Allah will make Paradise forbidden for him and will make the Fire obligatory for him.” They said, “Even if it is something insignificant?” He said, “Even if it is a stick from an arak tree!” He said it three times.