Muhammad Ibn Nadr Al-Haarithee (rahimahullaah) said:
Whoever lends an ear to a person of bidah, whilst being aware that he (i.e. such a person) is a person of bidah, then protection is removed from him (i.e. the listener) and he is entrusted to himself.
[Usool Al-Ittiqaad of Al-Laalikaa’ee 1/153]