Hadith #1529 (Jami' al-Tirmidhi)
Book: The Book on Vows and Oaths
Narrator(s): Abu Sa'id al-Khudri, Hanad bin al-Sari bin Mus'ab هناد بن السري بن مصعب, Hatm bin Isma'il al-Madni حاتم بن إسماعيل المدني, Jhdm bin 'Abdullah bin Aby جهضم بن عبد الله, Muhammad bin Ibrahim bin al-Harith محمد بن إبراهيم بن الحارث, Muhammad bin Zayd bin 'Abdullah محمد بن زيد بن عبد الله بن عمر, Shar bin Hushab al-Asha'ri شهر بن حوشب الأشعري

That the Messenger of Allah (ﷺ) said: “The atonement of a vow when it is not specified is the atonement of an oath.”

Source: https://parallelquran.com/hadith/jami-al-tirmidhi-1529/

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Hadith #2280 (Sunan Ibn Majah)
Book: The Chapters on Legal Punishments
Narrator(s): Abu Sa'id al-Khudri, Hatm bin Isma'il al-Madni حاتم بن إسماعيل المدني, Hisham bin 'Ammar bin Nasayr هشام بن عمار بن نصير, Jhdm bin 'Abdullah bin Aby جهضم بن عبد الله, Muhammad bin Ibrahim al-Bahly محمد بن إبراهيم الباهلي البصري, Muhammad bin Zayd bin 'Abdullah محمد بن زيد بن عبد الله بن عمر, Shar bin Hushab al-Asha'ri شهر بن حوشب الأشعري

“Whoever covers (the sin of) a Muslim, Allah will cover him (his sin) in this world and in the Hereafter.”

Source: https://parallelquran.com/hadith/sunan-ibn-majah-2280/