736/1 - Abu Hurayrah (may Allah be pleased with him) reported: “The Messenger of Allah (may Allah’s peace and blessings be upon him) never found fault with any food. If he liked it, he would eat it, and if he disliked it, he would leave it.” [Narrated by Al-Bukhāri and Muslim]
737/2 - Jābir (may Allah be pleased with him) reported that the Prophet (may Allah’s peace and blessings be upon him) asked his family for a dip (to eat with bread), and they replied: “We have nothing but vinegar.” So, he told them to bring it and began to eat, saying: “What an excellent dip vinegar is! What an excellent dip vinegar is!” [Narrated by Muslim]
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1) A person should recognize the value of his Lord’s favors. So, he should not find fault with any food by way of expressing dislike of it.
2) The Prophet (may Allah’s peace and blessings be upon him) was noble in manners. He never found fault with any lawful food.
One of the methods of spiritual education is to occasionally deprive oneself of the things it desires. A person should not seek all things he covets. A believer should train himself to live economically and not indulge in permissible pleasures; rather, he should only take as much as he needs. Life, with all its pleasures, is too narrow for a person to deem it a permanent home. Among the traits of the servants of the Most Merciful, as recommended in the Qur’an: {And [they are] those who, when they spend, do so not excessively or sparingly but are between them in a moderate way.} [Al-Furqān]
So, we should not deprive ourselves of our due share in permissible things, nor should we indulge in pleasures.