Sayyidina Abu Hurayrah (RA) reported that Allah’s Messenger p. b. u. h said, “A Muslim is the brother of a Muslim. So, he must not betray him, not tell him lies or adandon him. Everything of a Muslim that is unlawful to another Muslim includes his honour, his property and his blood. Taqwa is here (in the heart). It is enough to know a man is evil when he belittles his brother, Muslim.’

[Sunan At Tirmidhi # 1927]