Muslims do not differ on the fact that deliberately abandoning the obligatory prayer is among aʿdham al-ḏunūb wa akbar al-kabāʿir (ie: the gravest of sins and the greatest of major sins),
لا يختلف المسلمون أن ترك الصلاة المفروضة عمدا من اعظم الذنوب وأكبر الكبائر
and that its sin in the sight of Allah is greater than the sin of killing a soul,
وأن اثمه ثم الله أعظم من إثم قتل النفس
taking properties (unjustly),
وأخذ الأموال
and from the sin of al-zinā (ie: fornication),
ومن إثم الزنا
theft,
والسرقة
and drinking al-khamr (ie: alcohol);
وشرب الخمر
and that [the person concerned] is exposed to the punishment of Allah, His wrath, and His disgrace in this world and the Hereafter.
وأنه متعرض لعقوبة الله وسخطه وخزيه في الدنيا والآخرة
Ibn al-Qayyim, al-Ṣalāh wa Aḥkām Tārikihā 1/31
ابن القيم، الصلاة وأحكام تاركها ١/٣١
https://shamela.ws/book/7661/2
@ilmtest [https://t.me/ilmtest]