Sayyiduna Abu Umamah (may Allah be pleased with him) narrates that he heard the Prophet (peace and blessings be upon him) while he was riding al-Jad'a' (his she-camel), and Sayyiduna al-Fadl bin al-Abbas (may Allah be pleased with them both) was seated behind him. He was saying: "Do not swear (presumptuously) upon Allah, for whoever swears (presumptuously) upon Allah, Allah Almighty will prove him a liar."
Imam al-Tabarani recorded this narration in al-Mu'jam al-Kabir; its chain contains a narrator, Ali bin Yazid, who is da'if (weak), though he has been declared trustworthy.
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب الحج / 5638
Hadith Gradingمحدثین:إسنادہ ضعیف
Hadith Takhrij«أخرجه المعجم الكبير للطبراني برقم: 7898»