It is narrated from Sayyiduna Sahl bin Sa'd (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "I will reach the Pond before you. Whoever comes to me will drink, and whoever drinks will never be thirsty. Beware! Let it not be that some people come to me whom I recognise and who recognise me, and then a barrier is placed between me and them."
Hadith Referenceالمعجم الكبير للطبراني / باب السين / 5873