Qatadah (may Allah have mercy on him) said concerning "The recompense of those who wage war against Allah and His Messenger and strive to spread corruption in the land" [Surah al-Ma'idah: 33]: Allah Almighty has revealed 4 hudud: whoever wages war, sheds blood and takes property, upon him is crucifixion; whoever wages war and sheds blood but does not take property, upon him is killing; and whoever wages war and takes property but does not shed blood, upon him is exile.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب السرقة / 17316