Allah's Messenger (ﷺ) said, "Help your brother whether he is an oppressor or an oppressed," A man said, "O Allah's Messenger (ﷺ)! I will help him if he is oppressed, but if he is an oppressor, how shall I help him?" The Prophet (ﷺ) said, "By preventing him from oppressing (others), for that is how to help him."
Sahih al-Bukhari Book 89, Hadith 13
← Previous Hadith Allah's Messenger (ﷺ) said, "A Muslim is a brother of another Muslim. So he should neither oppress him nor hand him over to an oppressor. And whoever fulfilled the needs of his brother, Allah will fulfill his needs."

Sahih al-Bukhari Book 89, Hadith 12 Next Hadith → The Prophet (ﷺ) said, 'O people! The reward of deeds depends upon the intentions, and every person will get the reward according to what he has intended. So, whoever emigrated for Allah and His Apostle, then his emigration was for Allah and His Apostle, and whoever emigrated to take worldly benefit or for a woman to marry, then his emigration was for what he emigrated for."

Sahih al-Bukhari Book 90, Hadith 1