Bidding farewell to one's home with two rakahs

It is narrated from Sayyiduna Anas bin Malik (may Allah be pleased with him) that whenever the Prophet (peace and blessings be upon him) stopped at a place, he would bid it farewell with two rak'ahs when departing from it.
This hadith is sahih (authentic), but the two Shaykhs (Bukhari and Muslim) did not record it, and Uthman bin Sa'd is among those whose hadith are collected.

It is narrated from Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) that the Prophet (peace and blessings be upon him) said: "If people knew what I know about (the harms of) being alone, no rider would ever travel alone by night."
This hadith has a sahih (authentic) chain of narration, but the two Shaykhs (Bukhari and Muslim) did not record it.

It is narrated from Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) that a man set out from Khaybar, and two men followed him, while a third man came behind them saying: "Go back, both of you!" until he caught up with them and sent them back. Then he said (to the first man): "These two were devils. Convey my salam to the Messenger of Allah (peace and blessings be upon him) and tell him that we are gathering our charities; if they were lawful for him (to use), we would certainly send them to him." The narrator says: When that man came to the Prophet (peace and blessings be upon him) and told him about this incident, he (peace and blessings be upon him) then forbade travelling alone.
This hadith is sahih (authentic) on the condition of Imam Bukhari, but the two Shaykhs (Bukhari and Muslim) did not record it.