Narrated Abu Hazim from Sahl bin Sa`d: The Prophet (ﷺ) said, "I am your predecessor (forerunner) at the Lake-Fount, and whoever will pass by there, he will drink from it and whoever will drink from it, he will never be thirsty. There will come to me some people whom I will recognize, and they will recognize me, but a barrier will be placed between me and them."
Source: sunnah.com
Other translations
Arabic
حَدَّثَنَا سَعِيدُ بْنُ أَبِي مَرْيَمَ، حَدَّثَنَا مُحَمَّدُ بْنُ مُطَرِّفٍ، حَدَّثَنِي أَبُو حَازِمٍ، عَنْ سَهْلِ بْنِ سَعْدٍ، قَالَ قَالَ النَّبِيُّ صلى الله عليه وسلم " إِنِّي فَرَطُكُمْ عَلَى الْحَوْضِ، مَنْ مَرَّ عَلَىَّ شَرِبَ، وَمَنْ شَرِبَ لَمْ يَظْمَأْ أَبَدًا، لَيَرِدَنَّ عَلَىَّ أَقْوَامٌ أَعْرِفُهُمْ وَيَعْرِفُونِي، ثُمَّ يُحَالُ بَيْنِي وَبَيْنَهُمْ ".
sunnah.com