Bara bin Azib reported,
This was revealed concerning the Ansar. When the date palms were harvested, the Ansar would bring out from their orchards clusters of unripe dates and hang them on a rope stretched between two pillars in the masjid of the Messenger of Allah ﷺ, and the poor among the Emigrants would eat from them. But one of them would deliberately include a cluster containing shriveled, worthless dates, thinking it would pass unnoticed among the great number of clusters put there. So concerning those who did this, it was revealed, "and do not aim for the bad of it to spend" [Baqarah 2:267]. That is, do not deliberately pick out the shriveled dates from it to give away. "while you would not take it yourselves except with closed eyes" [Baqarah 2:267]. That is, if such a thing were offered to you as a gift, you would accept it only out of embarrassment before the giver, and with annoyance that he had sent you something you had no need of. And know that Allah has no need of your charity.
Azami 4000
Hasanفي قوله تعالى: {ومما أخرجنا لكم من الأرض ولا تيمموا الخبيث منه تنفقون}
عن البراء بن عازب قال
نزلت في الأنصار كانت الأنصار تخرج إذا كان جداد النخل من حيطانها أقناء البسر فيعلقونه على حبل بين أسطوانتين في مسجد رسول الله ﷺ فيأكل منه فقراء المهاجرين فيعمد أحدهم فيدخل قنوا فيه الحشف يظن أنه جائز في كثرة ما يوضع من الأقناء فنزل فيمن فعل ذلك {ولا تيمموا الخبيث منه تنفقون} يقول: لا تعمدوا للحشف منه تنفقون {ولستم بءاخذيه إلا أن تغمضوا فيه} يقول: لو أهدى لكم ما قبلتموه إلا على استحياء من صاحبه غيظا أنه بعث إليكم ما لم يكن لكم فيه حاجة، واعلموا أن الله غني عن صدقاتكم.
Ibn Majah (1822) narrated it from Ahmad bin Muhammad bin Yahya bin Saeed Qattan, who said, "Amr bin Muhammad Anqari narrated to us, who said, Asbat bin Nasr narrated to us, from Suddi, from Adi bin Thabit, from Bara bin Azib," and he related it.Tirmidhi (2987) also narrated it through another route from Suddi, from Abu Malik, from Bara bin Azib, and this is his wording. "And do not aim toward the worthless of it to spend" [Baqarah 2:267]. He said, "It was revealed concerning us, the community of the Ansar. We were owners of palm trees, and a man would bring from his palm trees according to how much or little he had. A man would bring a bunch or two bunches of dates and hang them in the masjid. The people of Suffah had no food, so when one of them grew hungry he would come to the bunch and strike it with his stick, and the ripening dates and dried dates would fall down, and he would eat. But there were some people, those with no real desire for good, who would bring a bunch containing shriveled and spoiled dates, or a bunch that had already broken, and hang it up. So Allah revealed 
,"O you who believe, spend from the good things you have earned and from what We have brought forth for you from the earth, and do not aim toward the worthless of it to spend, when you yourselves would not take it except with closed eyes" [Baqarah 2:267]. They said, "If one of them were given a gift like what he had given, he would not accept it except reluctantly or out of shame." He said, "So after that, each of us would bring the best of what he had."Tirmidhi said, "This is a hasan sahih gharib hadith, and Abu Malik is Ghifari, and it is said that his name was Ghazwan."I say, its chain is hasan because of Suddi, who is Ismail bin Abdul-Rahman bin Abu Kareema, one of the men found in Muslim, about whom there is disagreement. Juzjani accused him of lying and went to excess regarding him, perhaps due to his leaning toward shiism, while Imam Ahmad deemed him reliable. Nasai said, "He is sound." Ibn Adi said, "He has hadiths that he narrates from several teachers, and in my view his hadith is sound, he is truthful, and there is no harm in him."I say, this hadith is perhaps among what he narrates from two teachers, both of whom are truthful, and Hakim declared it sahih (2/285) according to the criterion of Muslim.