When any of them is given the good tidings of a girl, his face is darkened and he chokes inwardly, as he hides himself from the people because of the evil of the good tidings that have been given to him, whether he shall preserve her in humiliation, or trample her into the dust. (al-Nahl, 16.58-9)
When the female (infant) buried alive is questioned - for what crime was she killed? (al-Takwir, 81.8-9)
Do not slay your children because of the fear of poverty: We provide you and them. (al-Anam, 6.151)
One day, after Muhammads declaration of his Prophethood, one of his Companions came to him and narrated what he had done with his little daughter:
O Messenger of God, I had a daughter. One day I told her mother to dress her as I was taking her to her uncle - the poor mother knew what this meant, but she could do nothing but obey and weep. My wife dressed the infant, who was rejoicing at the news of going to the uncle. I took her near a well, and told her to look down into the well. While she was looking into the well, I kicked her into it. While she was rolling down, she was shouting Dad, Dad!
As he was recounting this, the Prophet, upon him be peace and blessings, sobbed as if he had lost one of his nearest kinsfolk