If anyone contends with the Messenger even after guidance has been
plainly conveyed to him, and follows a path other than that becoming to
men to faith, We shall leave him in the path he has chosen, and land him
into hell, what an evil refuge!�
(Suratunnisa 4 V: 115)
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"Oh Allah, I seek refuge in You lest I misguide others, or I am misguided by others, lest I cause others to err or I am caused to err, lest I abuse others or be abused, and lest I behave foolishly or meet with the foolishness of others".
(Abu-Dawud, Ibn Majah, Nasa'i, At-Termithi see also Al-Albani, Sahih At-Tirmithi 3/152 and Sahih Ibn Majah 2/336)