It is also narrated from Sayyiduna Abu Hurairah (may Allah be pleased with him) that the Noble Prophet (peace and blessings be upon him) said: When any one of you is performing prayer, Satan comes to him to cast doubts and uses various tricks just as a person makes a sound to stop his animal. When that person becomes familiar with him (Satan), he passes wind in his buttocks so that he may put him to trial regarding his prayer. (So remember that) when any one of you feels this, he should not go (to perform ablution) until he clearly hears a sound or perceives a smell.