Verse 14

لَهُۥ دَعْوَةُ ٱلْحَقِّ وَٱلَّذِينَ يَدْعُونَ مِن دُونِهِۦ لَا يَسْتَجِيبُونَ لَهُم بِشَىْءٍ إِلَّا كَبَـٰسِطِ كَفَّيْهِ إِلَى ٱلْمَآءِ لِيَبْلُغَ فَاهُ وَمَا هُوَ بِبَـٰلِغِهِۦ وَمَا دُعَآءُ ٱلْكَـٰفِرِينَ إِلَّا فِى ضَلَـٰلٍ

Calling upon Him is the right thing, and those who call upon others besides Him, they will never respond to them, like the one who stretches his hands to the water in order to drink it but nothing reaches his mouth. And the calling of the unfaithful is always in vain.