Avoid Harming Others

Narrated ‘Abdullah bin ‘Amr:
The Prophet (ﷺ) said, “A Muslim is the one who avoids harming Muslims with his tongue and hands. And a Muhajir (emigrant) is the one who gives up (abandons) all what Allah has forbidden.”

[Sahih al Bukhari]

Believers are like One Body

An-Nu’man ibn Basheer reported: The Messenger of Allah, peace and blessings be upon him, said, “The parable of the believers in their affection, mercy, and compassion for each other is that of a body. When any limb aches, the whole body reacts with sleeplessness and fever.”

Source: Ṣaḥīḥ al-Bukhārī 5665, Ṣaḥīḥ Muslim 2586