Whoever sits with Ahlul Bidah is not safe from one of three affairs-Imaam Sufyaan Ath-Thawri
بِسْمِ اللَّهِ الرَّحْمَٰنِ الرَّحِيمِ
Imaam Sufyaan Ath-thawri [rahimahullaah] said:
The one who sits with a person of innovation is not safe from one of three [calamities]: [a] Either he becomes a trial for other than himself; [b] or something of [misguidance] enters into his heart, and thus he slips by way of that and Allaah enters him into the hell fire; [c] or he says: ”By Allaah, I don’t care what they say because I am sure of myself”, but whoever feels safe about his religion [without Allaah’s guidance, protection etc] in the twinkling of an eye, it will be snatched away from him.
[Source: البدع والنهي عنها of Ibn Wadaah page 54]