Satan starts to divide when Azan starts. Satan's frightened escape is often seen by many animals. Then she cries or screams in fear. Similarly, the dog cries or barks because of this. Narrated by Hazrat Abu Hurairah. The Prophet (peace and blessings of Allaah be upon him) said: When the Shaytaan hears the call to prayer, he runs away while talking so that the sound of the call to prayer may not reach his ears. When the muezzin finished the call to prayer, he came back (in the mind of the worshiper) and began to create doubts. When he heard the iqamah again, he ran away again so that the sound could not reach his ears. When the iqaamah is over, he comes back (in the minds of the worshipers) and starts creating doubts. -Sahih Muslim , ha. No. 369