salam, you wrote that father cannot be killed for killing his son/daughter, can a mother be killed for killing his son/daughter?

All perfect praise be to Allaah, the Lord of the Worlds. I testify that there is none worthy of worship except Allaah, and that Muhammad, sallallaahu ‘alayhi wa sallam, is His Slave and Messenger.

This ruling applies to both parents, and the wording of the Hadeeth that was mentioned in this regard as reported in Musnad Imaam Ahmad and Sunan At-Tirmithi is as follows: “A parent is not to be killed for (killing) his son.” The word ‘parent’ includes both the father and the mother.

Among the meanings that the jurists mentioned while justifying this ruling, is their statement: “The parents are the reason for the existence of the child; so the child should not be a reason for their execution.” This meaning applies to both parents.

For more benefit, please refer to Fataawa 199565 and 138307.

Allaah Knows best.