It is narrated from Ikrimah (may Allah have mercy on him) that Sayyiduna Umar (may Allah be pleased with him) came to the pool of Majannah. It was said: "O Commander of the Believers! A dog has just now lapped from it." He said: "The dog drinks only with its tongue." Then he drank (the water) and performed ablution.
(b) The same account is reported from Ikrimah (may Allah have mercy on him), and in it: That which it lapped has gone, meaning the dogs took that water away in their bellies.
This is a well-known account from Umar, even though it is mursal (with a broken chain).
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الطهارة / 1222