None of you should wipe his hand with a napkin until he has licked it

It is narrated from Sayyiduna Jabir bin Abdullah (may Allah be pleased with them both) that he heard the Prophet (peace and blessings be upon him) say: "None of you should wipe his hand with a napkin until he has licked it, for a person does not know in which part of his food blessing has been placed for him. And indeed, Satan lies in wait for a person in everything, even at the time of his eating."
This hadith is sahih (authentic) on the condition of Muslim, but they did not record it in this form.

It is narrated from Sayyiduna Abu Hurayrah (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "Indeed, Satan is very sharp of sense and a licker (of hands), so guard yourselves against him. Whoever goes to sleep with the smell (of food) still on his hand and something afflicts him, let him blame no one but himself."
This hadith is sahih (authentic) on the condition of the two Shaykhs (Bukhari and Muslim), but they did not record it with these words.

It is narrated from Sayyiduna Anas bin Malik (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) would seat someone behind him (on his mount), would place his food on the ground and eat, would accept the invitation of a slave, and would ride a donkey.
This hadith has a sahih (authentic) chain, but the two Shaykhs (Bukhari and Muslim) did not record it.