Sayyidina Ans ibn Malik narrated: Someone asked Allah's Messenger, "What is Kawthar?” He said, “That is a river that Allah has given me, meaning, in Paradise. It is whiter than milk and sweeter than honey. There are birds over it whose necks are like necks of camels.” Umar (RA) said, “Indeed, this is a blessing!“ Allah’s Messenger (SAW) said, “Those who eat them will have more blessings than that.”
[Ahmed 13475]