It is narrated from Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) that the Messenger of Allah (peace and blessings be upon him) said: "Whoever among you sleeps having eaten greasy food without washing his hands, and then some harm befalls him (because of it), let him blame no one but himself."
Imam al-Tabarani (may Allah have mercy on him) said: "No one narrated this hadith from Muhammad bin Amr except Layth; Muhammad (bin Fudayl) is alone in narrating it."
Hadith Referenceالمعجم الأوسط / باب الباء / 3263
Hadith Takhrij«أخرجه عبد الرزاق فى «مصنفه» برقم: 19840، 20939، وابن أبي شيبة فى «مصنفه» برقم: 26740، والطبراني فى «الأوسط» برقم: 498»