She suffered from a mental disorder and killed four of her children; is her husband sinful if he divorces her?

Question:
This is a message from the listener Adam al-Zubayr al-‘Ayyid, a Sudanese resident of Riyadh. He sent a number of questions, saying in the first: I was blessed with five children from my wife, three daughters and two sons, and our life was as happy as it could be. But it was Allah’s decree that she be afflicted with a mental condition, and as a result of her affliction, she killed them all. One son, one son, and one daughter, using a sharp knife. He says: First, I ask the Honorable Shaykh to pray for her recovery. Then, I have separated from her by divorce after I did everything in my power to treat her. Is there any sin on me for divorcing her, given what Allah’s decree brought upon her? Knowing that her condition is critical, according to the decision of the specialist doctor.

Answer:
In the name of Allah, the Most Gracious, the Most Merciful. Praise be to Allah, Lord of the worlds, and may Allah send prayers and blessings upon His servant and Messenger, our Prophet Muhammad, and upon his family and his Companions. As for what this woman suffered from, namely the disorder of her mind and the loss of her awareness, this is a great calamity. And what followed from that, her killing of her children, is an even greater calamity. May Allah the Exalted console you, magnify your reward, and replace what you have lost with something better.
As for divorcing her, if she is not fit to continue living with you, and the doctors have mentioned that this condition persists with her and that such dangerous signs occur from her, then divorcing her is incumbent upon you. Praise be to Allah, so that you are safe from the remaining harms arising from her staying with you. Yes.