Al-Hajj 22:12

يَدْعُوا۟ مِن دُونِ ٱللَّهِ مَا لَا يَضُرُّهُۥ وَمَا لَا يَنفَعُهُۥ ۚ ذَٰلِكَ هُوَ ٱلضَّلَـٰلُ ٱلْبَعِيدُ

Yadʿū min dūni l-lahi mā lā yaḍurruhu wamā lā yanfaʿuhu dhālika huwa l-ḍalālu l-baʿīdu

He invokes instead of Allāh that which neither harms him nor benefits him. That is what is the extreme error.