Sahih Muslim Book 023, Hadith Number 5094.
Chapter : The merit of vinegar as a condiment.
Jabir b. 'Abdullah reported: Allah's Messenger (may peace be upon him) took hold of my hand one day (and led me) to his residence. There was presented to him some pieces of bread, whereupon he said: Is there no condiment? They (the members of his household) said: No, except some vinegar. He (the Holy Prophet) said: Vinegar is a good condiment. Jabir said: I have always loved vinegar since I heard it from Allah's Apostle (may peace be upon him). Talha said: I have always loved vinegar since I heard about it from Jabir.