Hadith #230 (Sahih Muslim)
Book: The Book of Faith
Narrator(s): Hakim ibn Hizam
Grade: Sahih

Do you think that there is any thing for me (of he reward with the Lord) for the deed of religious purification that I did in the state of ignorance? Upon this he (the Messenger of Allah) said to him: You accepted Islam with all the previous virtues that you practised.

Source: https://parallelquran.com/hadith/sahih-muslim-230/

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Hadith #231 (Sahih Muslim)
Book: The Book of Faith
Narrator(s): Hakim ibn Hizam
Grade: Sahih

Messenger of Allah, do you think if there is any reward (of the Lord with me on the Day of Resurrection) for the deeds of religious purification that I performed in the state of ignorance, such as charity, freeing a slave, cementing of blood-relations? Upon this he (the Messenger of Allah) said to him: You have accepted Islam with all the previous virtues that you had practised.

Source: https://parallelquran.com/hadith/sahih-muslim-231/

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Hadith #2270 (Sahih Muslim)
Book: The Book of Zakat
Narrator(s): Hakim ibn Hizam
Grade: Sahih

The most excellent Sadaqa or the best of Sadaqa is that after giving which the (giver) remains rich and the upper hand is better than the lower hand, and begin from the members of your household.

Source: https://parallelquran.com/hadith/sahih-muslim-2270/

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Hadith #2271 (Sahih Muslim)
Book: The Book of Zakat
Narrator(s): Hakim ibn Hizam
Grade: Sahih

I begged the Messenger of Allah (ﷺ), and he gave me. I again begged, he again gave me. I again begged, he again gave me, and then said: This property is green and sweet; he who receives it with a cheerful heart is blessed in it, and he who receives it with an avaricious mind would not be blessed in it, he being like one who eats without being satished, and the upper hand is better thad the lower hand.

Source: https://parallelquran.com/hadith/sahih-muslim-2271/

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Hadith #3729 (Sahih Muslim)
Book: The Book of Transactions
Narrator(s): Hakim ibn Hizam
Grade: Sahih

Both parties in a business transaction have the right to annul it so long as they have not separated; and if they speak the truth and make everything clear they will be blessed in their transaction; but if they tell a lie and conceal anything the blessing on their transaction will be blotted out.

Source: https://parallelquran.com/hadith/sahih-muslim-3729/