Abu Hurairah (may Allah be pleased with him) narrates that the Messenger of Allah (peace and blessings of Allah be upon him) passed by a heap of grain, and he put his hand inside it. His fingers became wet, so he said: "O owner of the grain! What is this matter?" He replied: "O Messenger of Allah! It was wetted by rain." He said: "Why did you not put it on top so that people could see it?" Then he said: "Whoever deceives, is not from us." .
Imam Tirmidhi says: 1- The hadith of Abu Hurairah (may Allah be pleased with him) is Hasan Sahih. 2- In this chapter, hadiths have also been narrated from Ibn Umar, Abu Humrah, Ibn Abbas, Buraydah, Abu Burdah bin Dinar, and Hudhayfah bin Al-Yaman (may Allah be pleased with them). 3- The people of knowledge act upon this. They dislike deception and declare it to be haram.
Hadith Referenceسنن ترمذي / كتاب البيوع عن رسول الله صلى الله عليه وسلم / 1315
Hadith Gradingالألبانی:صحيح، ابن ماجة (2224)
Hadith Takhrij«صحیح البخاری/الإیمان 43 (102) ، سنن ابی داود/ البیوع 52 (3452) ، سنن ابن ماجہ/التجارات 36 (2224) ، ( تحفة الأشراف : 13979) ، و مسند احمد (2/242) (صحیح)»