When Heraclius returned in triumph from the Persian war, he entertained, at Emesa, one of the ambassadors of Mahomet, who invited the princes and nations of the earth to the profession of Islam. On this foundation the zeal of the Arabians has supposed the secret conversion of the Christian emperor: the vanity of the Greeks has feigned a personal visit of the prince of Medina, who accepted from the royal bounty a rich domain, and a secure retreat, in the province of Syria. But the friendship of Heraclius and Mahomet was of short continuance: the new religion had inflamed rather than assuaged the rapacious spirit of the Saracens, and the murder of an envoy afforded a decent pretence for invading, with three thousand soldiers, the territory of Palestine, that extends to the eastward of the Jordan. The holy banner was intrusted to Zeid; and such was the discipline or enthusiasm of the rising sect, that the noblest chiefs served without reluctance under the slave of the prophet. On the event of his decease, Jaafar and Abdallah were successively substituted to the command; and if the three should perish in the war, the troops were authorized to elect their general. The three leaders were slain in the battle of Muta, the first military action, which tried the valor of the Moslems against a foreign enemy. Zeid fell, like a soldier, in the foremost ranks: the death of Jaafar was heroic and memorable: he lost his right hand: he shifted the standard to his left: the left was severed from his body: he embraced the standard with his bleeding stumps, till he was transfixed to the ground with fifty honorable wounds. "Advance," cried Abdallah, who stepped into the vacant place, "advance with confidence: either victory or paradise is our own." The lance of a Roman decided the alternative; but the falling standard was rescued by Caled, the proselyte of Mecca: nine swords were broken in his hand; and his valor withstood and repulsed the superior numbers of the Christians. In the nocturnal council of the camp he was chosen to command: his skilful evolutions of the ensuing day secured either the victory or the retreat of the Saracens; and Caled is renowned among his brethren and his enemies by the glorious appellation of the _Sword of God_. In the pulpit, Mahomet described, with prophetic rapture, the crowns of the blessed martyrs; but in private he betrayed the feelings of human nature: he was surprised as he wept over the daughter of Zeid: "What do I see?" said the astonished votary. "You see," replied the apostle, "a friend who is deploring the loss of his most faithful friend." After the conquest of Mecca, the sovereign of Arabia affected to prevent the hostile preparations of Heraclius; and solemnly proclaimed war against the Romans, without attempting to disguise the hardships and dangers of the enterprise. The Moslems were discouraged: they alleged the want of money, or horses, or provisions; the season of