Allah's Messenger (ﷺ) said, "Shall I tell you of the best families among the Ansar?" They (the people) said,
"Yes, O Allah's Messenger (ﷺ)!" The Prophet (ﷺ) said, "The best are Banu- An-Najjar, and after them are Banu
`Abdil Ash-hal, and after them are Banu Al-Harith bin Al-Khazraj, and after them are Banu Sa`ida."
The Prophet (ﷺ) then moved his hand by closing his fingers and then opening them like one throwing
something, and then said, "Anyhow, there is good in all the families of the Ansar. "
Sahih al-Bukhari Book 68, Hadith 49
The Messenger of Allah said: "None of you should fail to say, when he enters his toilet: 'Allahumma inni a`udhu bika minar-rijsin-najis, al-khabithil-mukhbith, ash-Shaitanir-rajim (O Allah, I seek refuge with You from the filthy and impure, the evil one with evil companions, the accursed Shaitan).'" (Da'if)
Another chain with a slightly different wording from Ibn Abi Maryam who mentioned similar, but he did not say in his narration: "Minar-rijsin-najis (From the filthy and the impure)" he only said: "Minal-khabithil-mukhbith, ash-Shaitanir-rajim (From the evil one with evil companions, the accursed Shaitan)."
Sunan Ibn Majah Book 1, Hadith 33