Amir ul-Mu’minīn ‘Ali (a.s.) says that a woman came to the Holy Prophet (S) and said,
“My husband is very severe and misbehaves with me, so I have prepared something for him that he may become kind to me.” (i.e. I have prepared a magical potion to change his attitude).
The Holy Prophet (S) said,
“Curse be upon you! You have darkened the realms of the seas and the lands, the angels of the earth and the heavens curse you.”
After going from there the woman began to fast during the days and pray during the night and she trimmed her hair and started wearing a leather garment. When the Holy Prophet (S) learnt of this he remarked that her fasting and prayers would not be accepted.( Kitab Faqih )