The Messenger of Allah ﷺ recited "Indeed, those who have said, 'Our Lord is Allah,' and then remained steadfast" [Fussilat 41:30] and said, "People have said it, but most of them then disbelieved. Whoever dies upon it is among those who remained steadfast."
حدثنا أبو حفص عمرو بن علي الفلاس حدثنا أبو قتيبة سلم بن قتيبة حدثنا سهيل بن أبي حزم القطعي حدثنا ثابت البناني
أن رسول الله ﷺ قرأ {إن الذين قالوا ربنا الله ثم استقاموا} قال قد قال الناس ثم كفر أكثرهم فمن مات عليها فهو ممن استقام
No references are available.
Takhrij (referencing) [its chain is daif]. Nasai also narrated it in Kubra, hadith 11470, from Amr bin Ali through the same chain.Suhayl bin Abu Hazm is daif (Taqrib*).Regarding his saying, "This verse is also narrated concerning the Prophet ﷺ, Abu Bakr, and Umar..." etc, see Durr Manthur, 5/363.