´It was narrated that 'Uqbah bin 'Amir said:` "I heard the Messenger of Allah (ﷺ) say: 'The Muslim is the brother of another Muslim, and it is not permissible for a Muslim to sell his brother goods in which there is a defect, without pointing that out to him."'
Hadith Referenceسنن ابن ماجه / كتاب التجارات / 2246
Hadith Gradingالألبانی:صحيح ولـ م الجملة الأولى نحوه | زبیر علی زئی:صحيح مسلم