Sayyiduna Ka'b bin Ujrah (may Allah be pleased with him) narrates: I saw the Prophet (peace and blessings be upon him) eating with his three fingers, the thumb and the two fingers next to it. (After finishing the meal) he would first lick the middle finger, then the one next to it, and then the thumb (he would lick).
Al-Tabarani recorded it in al-Mu'jam al-Awsat. Its chain contains al-Husayn bin Ibrahim al-Udhuni and Muhammad bin Ka'b bin Ujrah, and I do not know either of them. The remaining narrators are thiqat (trustworthy).
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب الأطعمة / 7941
Hadith Gradingمحدثین:إسناده ضعیف
Hadith Takhrij«اخرجه الطبراني فى المعجم الاوسط (1670) ، أخرجه مسند أحمد برقم: 26626، وأخرجه سنن الدارمي برقم: 2034، وأخرجه المعجم الأوسط للطبراني برقم: 1670»