Abdullah bin Ubayd bin Umayr (may Allah have mercy on him) said that a group of the Companions (may Allah be pleased with them) came to Sayyiduna Jabir bin Abdullah (may Allah be pleased with him), and he placed bread and vinegar before them and said: "Eat, for I heard the Messenger of Allah (peace and blessings be upon him) say: 'The best condiment is vinegar. It is enough ruin for a man that his brothers come to him and he considers what is in his house too insignificant to offer them; and it is enough ruin for people that they consider what is offered to them insignificant.'"
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصداق / 14624