Complex sentence: Wali Khan was infamous for his cruelty, and if courtiers "raised their eyes" to him he would murder them, when the call to prayer was made by a muezzin, and his voice was too loud the muezzin was murdered by Wali Khan.
Split into simpler sentences: Wali Khan was infamous for his cruelty, and if courtiers "raised their eyes" to him he would murder them. When the call to prayer was made by a muezzin, and his voice was too loud, the muezzin was murdered by Wali Khan.