"What is Al-Kawthar?" He said: "That is a river that Allah has given me"- that is, in Paradise- 'whiter than milk and sweeter than honey. In it are birds whose necks are like the necks of camels." 'Umar said: "Indeed this is plump and luxurious then." So the Messenger of Allah (s.a.w) said, "Those who consume it are more plumb than it."
Jami` at-Tirmidhi Book 38, Hadith 20
← Previous Hadith "I heard the Messenger of Allah (s.a.w) while mentioning the Lote-Tree of the Utmost Boundary, saying: 'A rider will travel in the shade of one of its branches for a hundred years,' or 'a hundred riders will seek to shade themselves with its shade'-(lne of the narrators) Yahya' was in doubt- 'in it are butterflies of gold, it is as if its fruits are Qilal."

Jami` at-Tirmidhi Book 38, Hadith 19 Next Hadith → "O Messenger of Allah, are there horses in Paradise?" He said, "If Allah admits you into Paradise, you will not wish to be carried, on a horse of rubies that will fly with you wherever you want in Paradise except that you will do so." He said: "And a man asked him: 'O Messenger of Allah, are there camels in Paradise?'" He said: "So he (ﷺ) did not say what he said to his companion, rather, he (ﷺ) said: 'If Allah admits you into Paradise, you will have in it whatever is desired by your soul and pleasing to your eye.'" Another chain reports a similar narration.

Jami` at-Tirmidhi Book 38, Hadith 21