当古莱什部落皈依伊斯兰教后，他们担心与沙姆和伊拉克的商路会被切断，因为这些地区处于拜占庭和萨珊王朝的统治之下，而这两个帝国都拒绝了伊斯兰的召唤。据贾比尔·本·萨穆拉报道，先知ﷺ回应了这一担忧，向古莱什人保证这两个帝国很快就会在这两个地区消失。他说：“当科斯洛埃斯死去之后，不会再有科斯洛埃斯了。”

When the Quraysh tribe embraced Islam, they feared being blocked from their trade routes to Shām and Iraq, since these territories were under Byzantine and Sassanid rule and both had rejected the call to Islam. Jābir ibn Samurah  reports the Prophet صلى الله عليه وسلم addressing this concern by reassuring Quraysh that those empires would soon vanish from both regions. He said, “When Chosroes dies, there will be no Chosroes after him.

当凯撒死去时，此后将不再有凯撒。我指着掌握穆罕默德灵魂之主的名义起誓，他们的财宝将被用于真主的道路上。”286 伊玛目沙斐仪和赫塔比（卒于988年）解释说，这意味着在大叙利亚将不会再有凯撒，在伊拉克（萨珊波斯）也不会再有其他的霍斯鲁。事实上，在先知ﷺ在世期间最后一位掌权的霍斯鲁是叶兹德吉尔德三世（卒于651年），他果然成为萨珊王朝的第38位也是最后一位国王。在先知ﷺ在世期间最后一位凯撒是希拉克略（卒于641年），拜占庭确实在他统治期间崩溃，并失去了基督教最神圣的圣地耶路撒冷。

And when Caesar dies, there will be no Caesar after him. And I swear by the One in whose hand is Muhammad’s soul, their treasures will be spent in the path of God.”286 Imam al-Shāfi‘ī and al-Khaṭṭ ābī (d. 988) explained that this meant there would never be another Caesar in Greater Syria, nor any other Chosroes in Iraq (Sassanid Persia). Indeed, the final Chosroes who rose to power during the Prophet’s صلى الله عليه وسلم life was Yazdegerd III (d. 651), and he indeed became the 38th and final king of the Sassanid Empire. The final Caesar during the Prophet’s صلى الله عليه وسلم life was Heraclius (d. 641), and Byzantium did in fact collapse and lose Christendom’s holiest site of Jerusalem during his reign.