Соответствующая норма
Practice Relating to Rule 7. The Principle of Distinction between Civilian Objects and Military Objectives
Section D. Attacks against places of civilian concentration, including schools
The Report on the Practice of Jordan states that Islam prohibits attacks against civilians and mentions an order given by Caliph Abu Bakr (632–634 AD) proscribing the destruction of any dwelling. The report adds that, considering the time at which it was issued, this order should be highly esteemed. 
Report on the Practice of Jordan, 1997, Chapter 1.4.