Musannaf Ibn Abi Shayba 19:928

29000 Abu Bakr narrated to us, he said: Waki’ narrated to us, he said: Sufyan narrated to us, from Sa’id, from Abu Ma’shar, from Ibrahim, regarding the woman who apostatizes from Islam: He said: She is to be asked to repent. If she repents, [then it is accepted], and if not, she is to be killed.