Complex sentence: Abdullah ibn Salam was a Levite Jewish rabbi in Yathrib belonged to Banu Qaynuqa tribe who was widely respected and honoured by the people of the city even by those who were not Jewish.
Split into simpler sentences: Abdullah ibn Salam was a Levite Jewish rabbi in Yathrib belonged to Banu Qaynuqa tribe. He was widely respected and honoured by the people of the city even by those who were not Jewish.