It is narrated from Sayyiduna Sufyan bin Asid Hadhrami (may Allah be pleased with him) that indeed he heard the Messenger of Allah (peace and blessings be upon him) say: "The greatest betrayal is that you speak to your brother about something and he believes you to be truthful, while you are lying to him."
Hadith Referenceمسند الشهاب / 611
Hadith Gradingمحدثین:إسناده ضعيف
Hadith Takhrij«إسناده ضعيف ، وأخرجه أبو داود : 4971، والادب المفرد : 393» ابوشریح اور اس کا والد مجہول ہے ۔