On the Day of Qiyaamah, an Aalim from the Ulama of the Ummah of Rasulullah (Sallallahu alaihi wasallam) will be ushered into the Presence of Allah Ta’ala. Allah Ta’ala will say to Jibraeel (Alaihis salaam): “O Jibraeel! Take his hand and present him to Muhammad (Sallallahu alaihi wasallam).”
Jibraeel (Alaihis salaam) will take the Aalim to Rasulullah (Sallallahu alaihi wasallam) who at that time will be at Haudh-e-Kauthar giving water to members of his Ummah. Nabi (Sallallahu alaihi wasallam) will be serving water to them in utensils. Rasulullah (Sallallahu alaihi wasallam) will stand up and give the Aalim water to drink from his hand. The Aalim will not be given water in a mug/cup, but will drink from the Mubaarak hand of Rasulullah (Sallallahu alaihi wasallam).
The people will enviously ask: “O Rasulullah! You give the people water in utensils, but you give him to drink from your hand.” Rasulullah (Sallallahu alaihi wasallam) will respond: “Yes. Verily, the people were engrossed in the world with trade while he was involved with Ilm (of the Deen).”
Then will come the command to cross the Siraat (the Bridge over Jahannum). Someone trapped far below the Aalim, will cry out: “Help me!” The Aalim will ask: “Who are you?” The suffering person will say: “I was one of your friends.” The Aalim will supplicate to Allah Ta’ala: “O my Rabb! He is one of my friends.” Allah Ta’ala will accept the Aalim’s intercession, and the man will be saved.
(Source: Subulas-Salaam, page 39)