Hazrat Abu Huraira (may Allah be pleased with him) narrated that the Holy Prophet (peace and blessings of Allah be upon him) said: Sulaiman bin Dawood (peace be upon him) said, "Tonight I will go to my seventy wives, and each wife will give birth to a horseman who will fight in the way of Allah." His companion said, "InshaAllah (if Allah wills)," but he did not say it. Consequently, none of the wives gave birth except one, and even she gave birth to a child who was incomplete on one side. The Holy Prophet (peace and blessings of Allah be upon him) said that if Sulaiman (peace be upon him) had said "InshaAllah," (then children would have been born to all of them) and they would have fought in the way of Allah.