Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
bayhaqi:14616ʿAlī > Aḥmad > al-Ḥārith b. Abū Usāmah > Rawḥ b. ʿUbādah > Ibn Jurayj > ʿAṭāʾ > Ibn ʿAbbās

[Machine] The Prophet of Allah ﷺ said, "When one of you eats food, let him not wipe his hand until he licks it or someone else licks it."  

البيهقي:١٤٦١٦أَخْبَرَنَا عَلِيٌّ نا أَحْمَدُ نا الْحَارِثُ بْنُ أَبِي أُسَامَةَ نا رَوْحُ بْنُ عُبَادَةَ نا ابْنُ جُرَيْجٍ قَالَ سَمِعْتُ عَطَاءً يَقُولُ سَمِعْتُ ابْنَ عَبَّاسٍ ؓ يَقُولُ

قَالَ رَسُولُ اللهِ ﷺ إِذَا أَكَلَ أَحَدُكُمْ مِنَ الطَّعَامِ فَلَا يَمْسَحْ يَدَهُ حَتَّى يَلْعَقَهَا أَوْ يُلْعِقَهَا  

رَوَاهُ مُسْلِمٌ فِي الصَّحِيحِ عَنْ هَارُونَ بْنِ عَبْدِ اللهِ عَنْ حَجَّاجِ بْنِ مُحَمَّدٍ وَعَنْ زُهَيْرِ بْنِ حَرْبٍ عَنْ رَوْحِ بْنِ عُبَادَةَ