Reference: Tabaqaatul-Hanaabilah v2 p44, Manhajul-Ahmad, Sharhus-Sunnah lil-Barbahaaree
mentions:
The innovators are like scorpions.
They bury their heads and bodies in the sand and leave their tails out.
When they get the chance they sting; the same with the innovators who conceal themselves amongst the people, when they are able, they do what they desire.
