Musannaf Ibn Abi Shayba 9:1249

Abu Bakr narrated to us, he said: Jarir narrated to us, from Mansur, from Salim, from Kurayb, from Ibn Abbas, who said: The Messenger of Allah (may Allah bless him and grant him peace) said: "If one of you, when he intends to approach his wife, says: 'In the name of Allah, O Allah, keep Satan away from us and keep Satan away from what You provide us,' then if a child is decreed between them in that, Satan will never harm him."