Musannaf Ibn Abi Shaybah 12602 — A woman fasting in expiation

Mughirah said: I asked Ibrahim about a heavy sleeper whose child was sleeping beside her, and in the morning he was found dead (what is the ruling?). He said: It is better for her peace of mind that she pay an expiation: free a slave, or fast sixty consecutive days. I said: What if she menstruates during the fasts? He said: That is something women cannot avoid; when her menstruation ends, she should make up the fasts of those days (and not begin all the fasts again).