Everything of a Muslim is sacred to a Muslim : his property, honour and blood. It is enough evil for any man to despise his brother Muslim.
Sunan Abi Dawud Book 43, Hadith 110
← Previous Hadith The Prophet (ﷺ) said: If anyone eats once at the cost of a Muslim's honour, Allah will give him a like amount of Jahannam to eat; if anyone clothes himself with a garment at the cost of a Muslim's honour, Allah will clothe him with like amount of Jahannam; and if anyone puts himself in a position of reputation and show Allah will disgrace him with a place of reputation and show on the Day of Resurrection.

Sunan Abi Dawud Book 43, Hadith 109 Next Hadith → The Prophet (ﷺ) said: If anyone guards a believer from a hypocrite, Allah will send an angel who will guard his flesh on the Day of Resurrection from the fire of Jahannam; but if anyone attacks a Muslim saying something by which he wishes to disgrace him, he will be restrained by Allah on the bridge over Jahannam till he is acquitted of what he said.

Sunan Abi Dawud Book 43, Hadith 111