The Prophet ﷺ said, "In Paradise there are a hundred levels. If all the worlds were to gather in just one of them, it would have room enough for them all."
حدثنا قتيبة حدثنا ابن لهيعة عن دراج عن أبي الهيثم
عن النبي ﷺ قال إن في الجنة مائة درجة لو أن العالمين اجتمعوا في إحداهن لوسعتهم
[Its chain is daif]. Ahmad narrated it: 29/3, from the hadith of Ibn Lahia, with the same wording, and he narrated it using "an" (indicating a possible break in the chain). See hadith 2033 for its defect. The hadith is also documented in Nihayah, in my edition, hadith 1298.