Do not learn from Ahlul Bidah, even in affairs other than Aqeedah—Shaikh Uthaymeen (rahimahullaah)

Do not learn from ahlul bidah even in affairs other than Aqeedah—not even the Arabic language

Do not go near Ahlul Bidah

If you attend their lessons, a person may be deceived by you, saying: There is no harm in attending their lessons…

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http://www.sahab.net/forums/index.php?showtopic=146054

bidah, callers to misguidance, protection, scholars