Abu Sa’eed said:
“I heard the Messenger of Allah [SAW] say: ‘Whoever among you sees an evil, let him change it with his hand; if he cannot, then with his tongue; if he cannot, then with his heart- and that is the weakest of Faith.'”

আবূ সাঈদ (রাঃ) থেকে বর্ণিতঃ
তিনি বলেন, আমি রাসূলুল্লাহ্‌ (সাল্লাল্লাহু ‘আলাইহি ওয়া সাল্লাম)-কে বলতে শুনেছিঃ যখন তোমাদের কেউ কোন অপকর্ম দেখতে পায়, তখন সে যেন তা নিজ হাতে প্রতিহত করে, যদি ততটুকু শক্তি তার না থাকে, তবে সে যেন মুখে তা দূর করতে তৎপর হয়, যদি এই শক্তিও তার না থাকে, তবে সে যেন উক্ত মন্দ কাজকে মনে মনে ঘৃণা করে। আর এ হলো ঈমানের নিম্নতম পর্যায়।

Sunan an-Nasa’i 5008 [Sunnah.com/QuranX/iHadis (Bangla)]
In-book reference: Book 47, Hadith 24
English/Dar-us-Salam translation: Vol. 6, Book 47, Hadith 5011

Commentary:
From hadithaday.org
From hadithcommentary.wordpress.com

From Riyad as-Salihin:
Abu Sa’id Al-Khudri (May Allah be pleased with him) reported:
Messenger of Allah (ﷺ) said, “Whoever amongst you sees an evil, he must change it with his hand; if he is unable to do so, then with his tongue; and if he is unable to do so, then with his heart; and that is the weakest form of Faith”.
[Muslim]

Arabic/English book reference: Book 1, Hadith 184 [Sunnah.com/QuranX/]

From 40 Hadith Nawawi:
On the authority of Abu Sa`eed al-Khudree (may Allah be pleased with him) who said:
I heard the Messenger of Allah (ﷺ) say, “Whosoever of you sees an evil, let him change it with his hand; and if he is not able to do so, then [let him change it] with his tongue; and if he is not able to do so, then with his heart — and that is the weakest of faith.” [Muslim]

40 Hadith Nawawi 34 [Sunnah.com/iHadis (Bangla)]

From Sahih Muslim:
It is narrated on the authority of Tariq b. Shihab:
It was Marwan who initiated (the practice) of delivering khutbah (address) before the prayer on the ‘Id day. A man stood up and said: Prayer should precede khutbah. He (Marwan) remarked, This (practice) has been done away with. Upon this Abu Sa’id remarked: This man has performed (his duty) laid on him. I heard the Messenger of Allah as saying: He who amongst you sees something abominable should modify it with the help of his hand; and if he has not strength enough to do it, then he should do it with his tongue, and if he has not strength enough to do it, (even) then he should (abhor it) from his heart, and that is the least of faith.

Reference: Sahih Muslim 49 a [Sunnah.com/QuranX]
In-book reference: Book 1, Hadith 84