Allah has bought from the believers their persons and their goods, for (in return) theirs is the Garden. They shall fight in the Cause of Allah, and shall slay and be slain. It is a Promise that is binding on Him in the Torah and the Gospel, and the Qur'an. Who can fulfill a promise better than Allah? Rejoice then in the bargain you have made, for that is the Supreme Triumph. (Deuteronomy 6:4-5, 6:32. Matthew 10:5, 10:39, 19:29, 21:19).