The news of this great army having reached the Saracens while they were at Hems, filled them full of apprehensions, and put them to a very great strait as to the best course to pursue in this critical juncture.  Some of them would very willingly have shrunk back and returned to Arabia.  This course, they urged, presented a double advantage:  on the one hand they would be sure of speedy assistance from their friends; and on the other, in that barren country the numerous army of the enemy must needs be reduced to great scarcity.  But Abu Obeidah, fearing lest such a retreat might by the Caliph be interpreted cowardice in him, durst not approve of this advice.  Others would rather die in the defence of those stately buildings, fruitful fields, and pleasant meadows they had won by the sword, than voluntarily to return to their former starving condition.  They proposed therefore to remain where they were and wait the approach of the enemy.  But Kaled disapproved of their remaining in their present position, as it was too near Caesarea, where Constantine, the Emperor’s son, lay with forty thousand men; and recommended that they should march to Yermouk, where they might reckon on assistance from the Caliph.  As soon as Constantine heard of their departure, he sent a chiding letter to Mahan, and bade him mend his pace.  Mahan advanced, but made no haste to give the Saracens battle, having received orders from the Emperor to make overtures of peace, which were no sooner proposed than rejected by Abu Obeidah.  Several messages passed between them.  The Saracens, endeavoring to bring their countryman Jabalah Ebn Al Ayham, with his Christian Arabs, to a neutrality, were answered that they were obliged to serve the Emperor, and resolved to fight.  Upon this Kaled, contrary to the general advice, prepared to give him battle before Mahan should come up, although the number of his men—­who, however, were the elite of the whole army—­was very inconsiderable, urging that the Christians, being the army of the devil, had no advantage by their numbers against the Saracens, the army of God.  In choosing his men, Kaled had called out more Ansers[66] than Mohajerins,[67] which, when it was observed, occasioned some grumbling, as it then was doubted whether it was because he respected them most or because he had a mind to expose them to the greater danger, that he might favor the others.  Kaled told them that he had chosen them without any such regard, only because they were persons he could depend upon, whose valor he had proved, and who had the faith rooted in their hearts.  One Cathib, happening to be called after his brother Sahal, and looking upon himself to be the better man, resented it as a high affront, and roundly abused Kaled.  The latter, however, gave him very gentle and modest answers, to the great satisfaction of all, especially of Abu Obeidah, who, after a short contention, made them shake hands.  Kaled, indeed, was admirable in this respect, that he knew no less