Hadith #6184 (Sahih al-Bukhari)
Book: To make the Heart Tender (Ar-Riqaq)
Narrator(s): 'Utban bin Malik Al-Ansari
Grade: Sahih

who was one of the men of the tribe of Bani Salim: Allah’s Messenger (ﷺ) came to me and said, “If anybody comes on the Day of Resurrection who has said: La ilaha illal-lah, sincerely, with the intention to win Allah’s Pleasure, Allah will make the Hell-Fire forbidden for him.”

Source: https://parallelquran.com/hadith/sahih-al-bukhari-6184/

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Hadith #1950 (Sahih Muslim)
Book: The Book of Prayer - Two Eids
Narrator(s): 'Utban bin Malik Al-Ansari
Grade: Sahih

‘Umar b. Khattab asked me what the Messenger of Allah (ﷺ) recited on ‘Id day. I said:” The Hour drew near” and Qaf. By the Glorious Qur’an”.

Source: https://parallelquran.com/hadith/sahih-muslim-1950/