This is a ḥasan ṣaḥīḥ ḥadīth.

72 – Chapter: What has been reported concerning the disapproval of deception in sales

1362 – ʿAlī ibn Ḥujr narrated to us, he said: Ismāʿīl ibn Jaʿfar informed us, from al-ʿAlāʾ ibn ʿAbd al-Raḥmān, from his father, from Abū Hurayrah: that the Messenger of Allah, peace and blessings be upon him, passed by a pile of food, and inserted his hand into it, and his fingers touched dampness. He said: "O owner of the food, what is this?" He said: "Rain fell upon it, O Messenger of Allah." He said: "Why did you not put it on top of the food so that people could see it?" Then he said: "Whoever deceives is not of us."

Regarding this chapter, there are narrations from Ibn ʿUmar, Abū al-Ḥamrāʾ, Ibn ʿAbbās, Buraydah, Abū Burdah ibn Niyār, and Ḥudhayfah ibn al-Yamān.

The ḥadīth of Abū Hurayrah is a ḥasan ṣaḥīḥ ḥadīth.

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= Except with precise regulation of foodstuffs, and measures of wealth, and the condition of men. What the Prophet, peace and blessings be upon him, said is true, and what he did is a ruling. But this applies to a people whose intentions and religiosity were sound. As for a people who intend to consume people's wealth and cause hardship upon them, then Allah's door is wider, and His ruling is more decisive.

And the ruler, according to the Ḥanafīs and the Mālikīs, may fix prices of goods at a reasonable profit, and it is obligatory upon their owners to comply with that.

And consult necessarily "al-Muntaqā" 5/18–19 by al-Bājī, and "Badāʾiʿ al-Ṣanāʾiʿ" 5/129 by al-Kāsānī.

(1) In (b): became wet.
(2) In a copy in the margin of (a): deceived us.
(3) A ṣaḥīḥ ḥadīth, and it was recorded by Muslim (102), Abū Dāwūd (3452), and Ibn Mājah (2224), and it is in "al-Musnad" (7292), and "Ṣaḥīḥ Ibn Ḥibbān" (4905).