The debate of Ibn Abbas (may Allah be pleased with them) with the Haruriyyah (the Khawarij)

It is narrated from Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) that when the Haruriyyah (the Khawarij) came out, they gathered in a house, and they were six thousand. I came to Sayyiduna Ali (may Allah be pleased with him) and said: "O Commander of the Believers, delay the prayer until it is cooler, so that I may go to these people and speak with them." He said: "I fear for you." I said: "Not at all." (Abu Zumayl said:) Ibn Abbas (may Allah be pleased with them both) was handsome and had a loud voice. Ibn Abbas said: I went to them wearing the finest of Yemeni garments. I greeted them with salam, and they said: "Welcome to you, O Ibn Abbas! What is this garment?" I said: "What fault do you find with me? I have seen the finest garments on the Messenger of Allah (peace and blessings be upon him)." And I recited the verse: "Say: Who has forbidden the adornment of Allah which He has brought forth for His servants, and the good things of provision?" [Surah al-A'raf: 32] Then he mentioned his famous debate with them.
This hadith is sahih (authentic) on the condition of Muslim, but the two Shaykhs (Bukhari and Muslim) did not record it.

It is narrated from Sayyiduna Jabir (may Allah be pleased with him) that we went out with the Messenger of Allah (peace and blessings be upon him) on one of his military expeditions. A man came out in two worn-out, torn garments, intending to drive the camels. The Messenger of Allah (peace and blessings be upon him) asked about him: "Does he not have two (garments) other than these?" It was said: "There are two new garments in his bag." He (peace and blessings be upon him) said: "Bring his bag to me." He (peace and blessings be upon him) opened it, and there were two garments in it. He (peace and blessings be upon him) said to the man: "Take these two and put them on, and throw away these torn ones." He did so and began driving the camels. The Messenger of Allah (peace and blessings be upon him) kept looking after him as though amazed at his stinginess toward himself, and then he (peace and blessings be upon him) said: "May Allah strike your neck!" The man turned to him (peace and blessings be upon him) and said: "(O Messenger of Allah, is it) in the path of Allah?" And he was martyred on the day of (the Battle of) al-Yamamah.
This hadith is sahih (authentic) on the condition of Muslim, since he used Hisham bin Sa'd as evidence in several places, but the two Shaykhs (Bukhari and Muslim) did not record it. However, with Imam Malik this hadith is narrated via Zayd bin Aslam from Sayyiduna Jabir (may Allah be pleased with him).

This same narration is also reported from Sayyiduna Jabir bin Abdullah (may Allah be pleased with them both) with the chain of Imam Malik.

Qays bin Bishr al-Taghlibi says: My father used to sit with Sayyiduna Abu al-Darda' (may Allah be pleased with him) in Damascus. In Damascus there was a man of the Ansar from among the Companions of the Messenger of Allah (peace and blessings be upon him) who was called Ibn al-Hanzaliyyah. He kept to himself and rarely sat with people; he was occupied in prayer, and when he finished, he would be busy with takbir, tasbih and tahlil until he reached his home. One day he passed by us while we were with Sayyiduna Abu al-Darda' (may Allah be pleased with him), and he greeted us with salam. Sayyiduna Abu al-Darda' (may Allah be pleased with him) said: "Tell us something that will benefit us and will not harm you." He said that the Messenger of Allah (peace and blessings be upon him) said: "You are about to arrive among your brothers, so make your clothing proper and put your saddles and belongings in order, until you stand out among people like a beauty mark. Indeed, Allah Almighty does not love obscenity and foul speech."
This hadith is sahih al-isnad (its chain is authentic), but the two Shaykhs (Bukhari and Muslim) did not record it. And Ibn al-Hanzaliyyah, whom the narrator did not name, is Sayyiduna Sahl bin al-Hanzaliyyah (may Allah be pleased with him), one of the ascetics among the noble Companions.

It is narrated from Sayyiduna Mu'adh bin Anas al-Juhani (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) said: "Whoever gives up wearing (costly and splendid) clothing out of humility for the sake of Allah, the Mighty and Majestic, while he is able to afford it, Allah Almighty will call him on the Day of Resurrection before all of creation, until He gives him the choice to wear whichever of the garments of faith he wishes."
This hadith is sahih al-isnad (its chain is authentic), but the two Shaykhs (Bukhari and Muslim) did not record it.

It is narrated from Sayyiduna Jubayr bin Mut'im (may Allah be pleased with him) that people say (about me) that there is arrogance in me, yet I have ridden a donkey, I have held a sheep (or milked it), and I have worn a coarse wrap. And the Messenger of Allah (peace and blessings be upon him) said: "Whoever does these things (that is, adopts such simplicity), there is no share of arrogance left in him."
This hadith is sahih al-isnad (its chain is authentic), but the two Shaykhs (Bukhari and Muslim) did not record it.