Jabir (May Allah be pleased with him) reported:
The Prophet (ﷺ) asked for sauce and was told that there was nothing except vinegar. He asked for it and began to eat from it saying, "How excellent is vinegar when eaten as sauce! How excellent is vinegar when eaten as Udm!"[Muslim].
App reference: Book 3, Hadith 10
Arabic/English book reference: Book 3, Hadith 737