Analysis of information sources in references of the Wikipedia article "Expedition of Al Raji" in English language version.
The common version, however, is that B. Lihyan wanted to avenge the assassination of their chief at Muhammad's instigation, and bribed two clans of the tribe of Khuzaymah to say they wanted to become Muslims and ask Muhammad to send instructors.
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: ISBN / Date incompatibility (help) (online).