It is narrated from Hazrat Anas (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) forbade looting and said: Whoever commits looting is not one of us.
Hadith Referenceمسند احمد / مسند المكثرين من الصحابة / 12598
Hadith Gradingحکم دارالسلام:حديث صحيح، وهذا إسناد حسن