God, in a sense, has bought from the believers their souls (as they devote all their lives to a God pleasing way of life) and their belongings (that they devote to the charities and the cause of God) for the price of the Garden of Paradise. They fight in the way of God; they kill and are killed. The Lord’s promise (about the Paradise) is the truth. It is mentioned in Torah, Gospel and the Qur’an—and who fulfils his pledge better than God? Enjoy the deal that you have made with the Lord as this is the greatest achievement.