Remembering Allah before going to your wife

Volume 1, Book 4, Number 143:

Narrated Ibn 'Abbas:

The Prophet said, "If anyone of you on having sexual relations with his wife said (and he must say it before starting) 'In the name of Allah. O Allah! Protect us from Satan and also protect what you bestow upon us (i.e. the coming offspring) from Satan, and if it is destined that they should have a child then, Satan will never be able to harm that offspring."

http://www.holyebooks.org/islam/hadith_of_bukhari/004.sbt.html