“Having ill thoughts of Allaah”
Shaykh Saalih al-Fawzaan (hafidhahullaah) comments:
“Having ill thoughts of Allaah, ta’aala, is kufr (disbelief). He, ta’aala, said: {…they thought wrongly of Allaah – the thought of ignorance}, and He, ta’aala, said: {…who think evil thoughts about Allaah: for them is a disgraceful torment; and the Anger of Allaah is upon them, and He has cursed them and prepared Hell for them – and worst indeed is that destination}.”
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asaheeha translations