What one who remains among the dregs of people should do

Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) narrates this saying of the Prophet (peace and blessings be upon him): "O Abdullah bin Umar! What will become of you when you remain among the dregs of people, whose covenants and trusts have become mixed up, who have fallen into discord and become like this? The Prophet (peace and blessings be upon him) interlaced his fingers. He asked: O Messenger of Allah! What should one do then? The Prophet (peace and blessings be upon him) said: Accept what you recognise as good, leave what you regard as munkar (or evil), devote yourself particularly to your own self, and leave the people (to their condition)!"
Abu Ya'la recorded it from his teacher Sufyan bin Waki', and he is da'if (weak).

Sayyiduna Sahl bin Sa'd al-Sa'idi (may Allah be pleased with him) narrates: One day the Prophet (peace and blessings be upon him) came out to us while we were sitting in the gathering of Sayyiduna Amr bin al-As (may Allah be pleased with him) and his two sons. He said: What do you think, if you are left until a time when only the dregs of people remain, whose covenants and vows have become mixed up and entangled with one another, and they have become like this? The Prophet (peace and blessings be upon him) said this while interlacing his fingers. The people said: Allah and His Messenger know best. The Prophet (peace and blessings be upon him) said: "Take what you recognise as good, abandon what seems munkar (evil) to you, let each one of you take particular care of himself, and leave the general affairs of the people (to their condition)."

In a narration from him the wording is: "Beware of talawwun (taking on different colours) in the religion of Allah!"
Al-Tabarani recorded it with two chains, the narrators of one of which are thiqat (trustworthy).

Sayyiduna Ubadah bin al-Samit (may Allah be pleased with him) narrates: The Prophet (peace and blessings be upon him) said: "What will become of you when you remain among the dregs of people, who will fall into discord until they become like this? The Prophet (peace and blessings be upon him) said this while interlacing his fingers. Sayyiduna Ubadah (may Allah be pleased with him) said: Allah and His Messenger (peace and blessings be upon him) know best. The Prophet (peace and blessings be upon him) said: "Take what you recognise as good and abandon what you regard as munkar (or evil)."
Al-Tabarani recorded it; its chain contains a narrator whom I do not know, and a narrator Ziyad bin Abdullah, whom Ibn Hibban declared thiqah (trustworthy) and a group declared da'if (weak).

It is reported about Sayyiduna Abdullah bin Mas'ud (may Allah be pleased with him) that he said: "Mix with people, and deal with them amicably in what they like, but take care of your religion, lest you wound it."

In a narration the wording is: "Mix with people, but also keep apart from them."
Al-Tabarani recorded it with two chains, the narrators of one of which are thiqat (trustworthy).