The slightest noises, amplified by the sonorous echoes of the rocky heights, made the Believers start and shudder. They went on in the most profound silence, thinking only of how best to speed their camels. At last the lugubrious passage was traversed; the soldiers' breath came and went normally in their breasts now relieved of all oppression, and a wide, open space, suitable for pitching the tents, offered itself to their gaze. When the Believers had finished the work of encampment, the Prophet warned them that a heavy tempest would rage during the night, and he enjoined them solemnly: 'Let those in charge of camels tie them securely and no man leave his tent without a companion.' They had scarcely time to give a look at the hobbles of their beasts than the Prophet's prediction began to come true. The sun had set, covered by a misty veil, contrasting with its habitual sumptuous purple; its rayless pallor was the sign of an extraordinary storm. All of a sudden, a brownish curtain sprung up from the horizon, to drag in its moving folds the orb of day, and the shades of coming night took on a tarry tint. The darkness thickened to such an extent that each man might have thought he was struck blind. A strange rumbling sound arose from the depth of the desert and approached with incredible rapidity, soon changing its deafening uproar which might have been taken for the hissing of monstrous vipers, accompanied by diabolical vociferation. At the same moment, the camp was crushed by a gigantic whirling spout of sand, tearing away in its gyrations everything that was not securely fastened. The pitchy darkness gave way to yellow obscurity, still more impenetrable to the eye. Sheltered behind their camels, turning their backs to the tempest whilst shuddering and snorting in terror, the Faithful veiled their faces and covered their arms and legs, so as to guarantee their limbs against the fury of the raging sand that sank painfully into their flesh like thousands of wasps' stings. The soldiers flattened themselves face downwards on the ground, digging in their nails; holding fast in fear of being swept away like flock of wool.... Despite the horror of the hour, two soldiers forgot the formal directions of the Prophet. One of them, urged by necessity, left the encampment and at once fell suffocated. The other tried to run after his maddened camel that had broken its trammels and galloped away, only to be caught immediately in the whirlwind, and rolled round and round in its spirals, like a pebble spinning when hurled from a sling; and he was whisked up to the summit of the Jabala Tay. When told of this, the Prophet exclaimed: 'Did I not forbid you to leave the camp without a companion?' He invoked the Mercy of the Compassionate in favour of the suffocated soldier who gradually regained consciousness and came back to life. As for the other victim, the Tay mountains restored him when the expedition returned.