A man from the tribe of Ati bin Damrah Sa'di falsely attributed himself to someone else, so Hazrat Abi (may Allah be pleased with him) shamed him by mentioning his father's private parts. People said to him, "You do not usually speak so openly?" He replied, "We have been commanded to do so, and the Noble Prophet (peace and blessings be upon him) commanded us that if you hear a man attributing himself to the lineage of ignorance, then shame him by mentioning his father's private parts."

A man from the tribe of Ati bin Damrah Sa'di falsely attributed himself to someone else, so Hazrat Abi (may Allah be pleased with him) shamed him by mentioning his father's private parts. People said to him, "You do not usually speak so openly?" He replied, "We have been commanded to do so, and the Noble Prophet (peace and blessings be upon him) commanded us that if you hear a man attributing himself to the lineage of ignorance, then shame him by mentioning his father's private parts."

The previous hadith is also narrated through this second chain.
A man from Ati bin Damrah Sa'di attributed himself falsely to someone... Then the narrator mentioned the entire hadith and said: He (the Prophet) said, "We have been commanded to do this, and the Noble Prophet (peace and blessings be upon him) commanded us that if you hear a man attributing himself to the days of ignorance, then make him feel ashamed through his father's private parts."
The previous hadith is also narrated through this second chain.

Isma'il narrated to us, from Yunus, from al-Hasan, from 'Utayy, that a man expressed condolences in the manner of the Jahiliyyah, and he mentioned the hadith. Ubayy said: We used to be commanded, "If a man expresses condolences in the manner of the Jahiliyyah, then tell him to bite his father's private part and do not use euphemisms."

Abdullah narrated to us, Ubaydullah ibn Umar ibn Maysarah narrated to us, Yazid ibn Zuray’ narrated to us, Yunus narrated to us, from al-Hasan, from ‘Utayy, who said: Ubayy said: We used to be commanded, "when a man claims lineage," and he mentioned something similar.

It is narrated from Hazrat Ubayy bin Ka'b (may Allah be pleased with him) that the Noble Prophet (peace and blessings be upon him) said: There is also a devil for ablution who is called "Walahaan"; beware of him.

It is narrated from Hazrat Ubayy bin Ka'b (may Allah be pleased with him) that the Noble Prophet (peace and blessings be upon him) said: The food of the son of Adam has been made an example of the world; no matter how many salts and spices you add to it, see what its end will be?

‘Ati says that I saw an elder speaking in Madinah Munawwarah, so I asked people about him (who is he?). People told me that he is Hazrat Ubayy bin Ka‘b (may Allah be pleased with him). He said that when the time of Hazrat Adam’s (peace be upon him) departure from this world drew near, he said to his sons,“Children! My heart desires to eat the fruit of Paradise.”So his sons set out in search of the fruit of Paradise. They saw angels coming towards them, who had with them a shroud and embalming materials, and in their hands were axes, shovels, and spades. The angels asked them,“O children of Adam, where are you intending to go and what are you searching for?”They replied,“Our father is ill and his heart desires to eat the fruit of Paradise.”The angels said to them,“Go back, for your father’s final time has come near.”When the angels reached Hazrat Adam (peace be upon him), Hazrat Hawwa (peace be upon her) recognized them as soon as she saw them and clung to Hazrat Adam (peace be upon him). Hazrat Adam (peace be upon him) said to her,“Move back; it is because of you that these matters have come upon me. Leave the way for me and the angels of my Lord.”So the angels took his soul, bathed him, shrouded him, applied embalming materials, dug a pit and prepared a grave, performed his funeral prayer, then descended into the grave, laid him in it, leveled raw bricks over it, then came out of the grave and began to pour soil over him. After that, they said,“O children of Adam! This is the way to bury the dead.”