Sahih Muslim | Book 8 | Chapter 18

Narrated by Ibn 'Abbas
Ibn "Abbas (Allah be pleased with them) reported that Allah's Messenger (may peace be upon him) said: If anyone amongst you intends to go to his wife he should say: In the name of Allah, O Allah protect us against Satan and keep away the Satan from the one that you have bestowed upon us, and if He has ordained a male child for them, Satan will never be able to do any harm to him.

Narrated by
This hadith is narrated through another chain of transmitters and there is no mention of (the words) "Bismillah" (In the name of Allah) in it.