There are some more narrations with very minor changes in its wording.
Commentary: This Hadith highlights the following points:
1. Haud Al-Kauthar exists: Anas (May Allah be pleased with him) reported: When the Prophet (PBUH) was made to ascend to the heavens, he said (after his return), "I came upon a river (in Jannah) the banks of which were made of tents of hollow pearls. I asked Jibril (PBUH), 'What is this (river)?' He replied, 'This is the Kauthar."' (Al-Bukhari, vol. 6, Hadith No. 488).
2. Warning against vying with one another for the world.
3. Permissibility of visiting the graves of the Muslims and praying for them.