Hadith #3951 (Sahih Muslim)
Book: The Book of Musaqah
Narrator(s): Ma'mar bin 'Abdullah
Grade: Sahih

Sell it, and then buy with it barley. The slave went away and he got a sa’ (of barley) and a part of sa’ over and above that. When he came to Ma’mar he informed him about that, whereupon Ma’mar said to him: Why did you do that? Go back and return that, and do not accept but weight, for weight, for I used to hear from Allah’s Apostle (ﷺ) as saying: Wheat for wheat and like for like. He (one of the narrators) said: Our food in those days consisted of barley. It was said to him (Ma’mar) that (wheat) is not like that (barley). He replied: I am afraid these may not be similar

Source: https://parallelquran.com/hadith/sahih-muslim-3951/

------------------------------------------------------------

Hadith #3993 (Sahih Muslim)
Book: The Book of Musaqah
Narrator(s): Ma'mar bin 'Abdullah
Grade: Sahih

He who hoards is a sinner. It was said to Sa`id (b. al-Musayyib): You also hoard. Sa`id said: Ma`mar who narrated this hadith also hoarded.

Source: https://parallelquran.com/hadith/sahih-muslim-3993/

------------------------------------------------------------

Hadith #3994 (Sahih Muslim)
Book: The Book of Musaqah
Narrator(s): Ma'mar bin 'Abdullah
Grade: Sahih

No one hoards but the sinner.

Source: https://parallelquran.com/hadith/sahih-muslim-3994/

------------------------------------------------------------

Hadith #5951 (Sahih Muslim)
Book: The Book of Virtues
Narrator(s): Ma'mar bin 'Abdullah
Grade: Sahih

I said to Zuhri: What does (the word) al-‘Aqib imply? He said: One after whom there is no Prophet, and in the hadith transmitted on the authority of Ma’mar and ‘Uqail there is a slight variation of wording.

Source: https://parallelquran.com/hadith/sahih-muslim-5951/

------------------------------------------------------------

Hadith #1263 (Jami' al-Tirmidhi)
Book: The Book on Business
Narrator(s): Ibn Ishaq محمد بن إسحاق بن يسار‎, Ishaq bin Mansur al-Kausaj إسحاق بن منصور بن بهرام - الكوسج, Ma'mar bin 'Abdullah, Muhammad bin Ibrahim bin al-Harith محمد بن إبراهيم بن الحارث, Sa'id ibn al-Musayyib سعيد بن المسيب بن حزن أبو محمد القرشي, Yazid bin Harun يزيد بن هارون

“The Messenger of Allah (ﷺ) gave me on Dinar to purchase a sheep for him. So I purchased two sheeps for him, and I sold one of them for a Dinar. So I returned with the sheep and the Dinar to the Prophet (ﷺ), and I mentioned what had happened and he said: ‘May Allah bless you in your business dealings.’ After that we went to Kunasah in Al-Kufah, and he made tremendous profits. He was among the wealthiest of the people in Al-Kufah.”

Source: https://parallelquran.com/hadith/jami-al-tirmidhi-1263/

------------------------------------------------------------

Hadith #2237 (Sunan Ibn Majah)
Book: The Chapters on Pre-emption
Narrator(s): Abu Bakr bin Abi Shayba أبو بكر بن أبي شيبة, Ibn Ishaq محمد بن إسحاق بن يسار‎, Ma'mar bin 'Abdullah, Muhammad bin Ibrahim bin al-Harith محمد بن إبراهيم بن الحارث, Sa'id ibn al-Musayyib سعيد بن المسيب بن حزن أبو محمد القرشي, Yazid bin Harun يزيد بن هارون

“There is no preemption for a partner when his co-partner has beaten him to it (in another deal before), not for a minor nor one who is absent.”

Source: https://parallelquran.com/hadith/sunan-ibn-majah-2237/