The Companions of the Messenger of Allah (sallallahu alayhi wa sallam) did not consider the abandonment of any action as disbelief except neglecting Salat.
وعن شقيق بن عبد الله التابعي المتفق على جلالته رحمه الله
قال: كان أصحاب محمد صلى الله عليه وسلم: لا يرون شيئًا من الأعمال تركه كفر غير الصلاة
The Companions of the Messenger of Allah (sallallahu alayhi wa sallam) did not consider the abandonment of any action as disbelief except neglecting Salat.
Who passed it on, from Imam an-Nawawi back to the one who was there.
The same words, in another collection.
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