One who finds a louse while in the mosque

Sayyiduna Abu Hurayrah (may Allah be pleased with him) narrates that the Prophet (peace and blessings be upon him) said: "When any one of you finds a louse in the mosque, he should bury it."
Al-Bazzar and al-Tabarani in al-Mu'jam al-Awsat recorded it, and he added the words: "and he should remove it from himself." The chain of this narration contains a narrator, Yusuf bin Khalid al-Samti, who is da'if (weak).

Malik bin Yukhamir says: I saw Sayyiduna Mu'adh bin Jabal (may Allah be pleased with him) killing lice and fleas in the mosque.
Al-Tabarani recorded it in al-Mu'jam al-Kabir, and its narrators have been deemed trustworthy (muwaththaq).

A man from the Ansar reports this saying of the Prophet (peace and blessings be upon him): "When a person finds a louse in his garment, he should wrap it up (in the garment itself) and not throw it in the mosque."
Ahmad recorded it, and its narrators have been deemed trustworthy (muwaththaq).

An elder of the people of Makkah from Quraysh says: A man found a louse in his garment and took hold of it in order to throw it in the mosque. the Prophet (peace and blessings be upon him) said to him: "Do not do that; put it back in your garment until you go out of the mosque (and then throw it)."
Ahmad recorded it, and its narrators are thiqat (trustworthy), except that the narrator Muhammad bin Ishaq narrated it with 'an ('an'anah), and he is a mudallis (one who conceals defects in the chain).