I heard the Messenger of Allah ﷺ say, "Whoever preserves the five daily prayers, their bowing, their prostrations, their ablution, and their appointed times, and knows that they are a truth from Allah, will enter Paradise," or he said, "Paradise will be guaranteed for him."
حدثنا عبد الصمد وعفان قالا حدثنا همام حدثنا قتادة
سمعت رسول الله ﷺ يقول من حافظ على الصلوات الخمس ركوعهن وسجودهن ووضوئهن ومواقيتهن وعلم أنهن حق من عند الله دخل الجنة أو قال وجبت له الجنة
No references are available.
Its isnad is sahih. The hadith was narrated by Abu Dawud, 1/115, no. 425 and 2/62, no. 1420, and Nasai, 1/230, no. 461, both in the Book of Prayer, chapter on maintaining the prayer, and Ibn Majah, 1/448, no. 1401. Haythami said, 1/288, "Its narrators are the narrators of the sahih."