Zayd bin Aslam narrates from his father that Sayyiduna Umar (may Allah be pleased with him) went out to the mosque one day and found Sayyiduna Mu'adh bin Jabal (may Allah be pleased with him) sitting and weeping beside the blessed grave of the Messenger of Allah (peace and blessings be upon him). He asked: O Mu'adh, what has made you weep? He replied: What has made me weep is a hadith I heard from the Messenger of Allah (peace and blessings be upon him); he (peace and blessings be upon him) was saying: "Even a little showing off is shirk, and whoever shows enmity to the friends (awliya') of Allah has openly declared war on Allah. Indeed, Allah loves the righteous, the God-fearing and the hidden ones, who, if they are absent, are not missed, and if they are present, are not recognised. Their hearts are lamps of guidance; they come out safe from every dusty, dark trial." This is a hadith that has not been recorded in the "Two Sahihs", although both of them used the narration of Zayd bin Aslam from his father from the Companions as evidence, and both of them agreed on using as evidence the narration of al-Layth bin Sa'd from Ayyash bin Abbas al-Qitbani. This is a sahih Egyptian chain in which no hidden defect ('illah) is known.