The lowest of my Ummah may grant protection on their behalf

It is narrated from Sayyiduna Abu Hurayrah (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "Even the lowest person of my Ummah can grant protection (to an enemy)." And the hadith narrated from Sayyiduna Amr bin al-As (may Allah be pleased with him) is well known: when he entered upon Muhammad bin Abi Bakr (at the time of his killing), he asked him: Are you Muhammad bin Abi Bakr? He said: Yes. He asked: Have you come with any guarantee of safety? He said: No. So he said: I heard the Messenger of Allah (peace and blessings be upon him) say: "The blood of all the Muslims is equal."
This hadith also has supporting reports from Sayyiduna Abu Hurayrah and Amr bin al-As (may Allah be pleased with them both).

It is narrated from Sayyidah Aishah (may Allah be pleased with her) that the Messenger of Allah (peace and blessings be upon him) said: "The protection (dhimmah) of the Muslims is one; so if even one of them grants protection, do not break faith with it, for every treacherous person will have a banner on the Day of Resurrection by which he will be recognized."
This hadith has a sahih (authentic) chain of narration, but the two Shaykhs (Bukhari and Muslim) did not record it with this wording; they only agreed on mentioning the treacherous person (the one who breaks his word).