From Sahih Muslim (Hadith 5352):
Jabir b. 'Abdullah reported that Allah's Apostle (ﷺ) asked his family for condiment. They (the members of his household) said:We have nothing with us but vinegar. He asked for it, he began to eat it, and then said: Vinegar is a good condiment, vinegar is a good condiment
Reference: Muslim 5352