In Muharram of 626 the Beni Ghatafan, always formidable on account of their size and their desert hinterland, assembled in force at Dzat-al-Rica. Mahomet determinedly marched against them, and once more at the news of his approach their courage failed them, and they fled to the mountains. Mahomet came unexpectedly upon their habitations, carried off some of their women as slaves, and returned to Medina after fifteen days, having effectively crushed the incipient rising against him. The event is chiefly important as being the occasion which led Mahomet to institute the Service of Danger described in the Kuran, whereby half the army prayed or slept while the other watched. A body of men was therefore kept constantly under arms while the army was in the field, and public prayers were repeated twice.
"And when ye go forth to war in the land, it shall be no crime in you to cut short your prayers…. And when thou, O Apostle, shalt be among them and shalt pray with them, then let a party of them rise up with thee, but let them take their arms; and when they shall have made their prostrations, let them retire to your rear: then let another party that hath not prayed come forward, and let them pray with you; but let them take their precautions and their arms."
The military organisation is being gradually perfected, so that the Mahometan sword may finally be in the perpetual ascendant. This was the chief significance of a campaign which at best was only an interlude in the daily life of prayer, civil and domestic cares and regulations which took up Mahomet's life in the breathing space before the great Meccan attack.
Mahomet was absent from Medina but fifteen days, and he returned home resolved to take advantage of the respite from war. Not long after his return he happened to visit the house of Zeid, his adopted son, and chanced not on Zeid, but on his wife at her tiring. Mahomet was filled with her beauty, for her loveliness was past praise, and he coveted her. Zeinab herself was proud of the honour vouchsafed her, and was willing, indeed anxious, to become divorced for so mighty a ruler. Zeid, her husband, with that measureless devotion which the Prophet inspired in his followers, offered to divorce her for him. Mahomet at first refused, declaring it was not meet that such a thing should be, but after a time his desire proved too strong for him, and he consented. So Zeinab was divorced, and passed into the harem of the Prophet. And he justified the proceedings in Sura 33:
"And when Zeid had settled concerning her to divorce her, we married her to thee, that it might not be a crime in the Faithful to marry the wives of their adopted sons, when they have settled the affair concerning them…. No blame attacheth to the Prophet when God hath given him a permission."
There follows the sum of Mahomet's restrictions upon the dress and demeanour of women. They are to veil their faces when abroad, and suffer no man but their intimate kinsmen to look upon them. The Faithful are forbidden to go near the dwelling-places of the Prophet's wives without his permission, nor are they even to desire to marry them after the Prophet is dead. By such casual means, by decrees born out of the circumstances of his age and personal temperament, did Mahomet institute the customs which are more vital to the position and fate of Muslim women than all his utterances as to their just treatment and his injunctions against their oppression.
Power was already taking its insidious hold upon him, and his feet were set upon the path that led to the despotism of the Chalifate and the horrors of Muslim conquests. Allah is still omnipotent, but He is making continual and indispensable use of temporal means to achieve His ends, and His servant does likewise.
After the interlude of peace, Mahomet was called upon in July, 626, to undertake a punitive expedition to Jumat-al-Gandal, an oasis midway between the Red Sea and the Gulf of Persia. The expedition was successful, and the marauders dispersed. He had now reached the confines of Syria, and, with the extension of his expeditionary activities, his political horizon widened. He began to conceive himself as the predatory chief of Arabia, one who was regarded with awe and fear by the surrounding tribes, with the one exception of the stiff-necked city, Mecca, whose inhabitants he longed in vain to subdue. The success fostered his love of plunder, and inclined him more than ever to hold out this reward of valour to his followers. His stern and wary policy was justified by its success, for by it he had recovered from the severe blow at Ohod, but it threatened to become his master and set its perpetual seal upon his life.
In December, 626, he heard of the defection of the Beni Mustalik, a branch of the Khozaa tribe. They joined the Kureisch for mixed motives, chiefly political, for they hoped to make themselves and their religion secure by alliance with Mahomet's enemies. Mahomet learnt of their desertion through his efficient spies, and determined to anticipate any disturbance. With Ayesha and Omm Salma to accompany him, and an adequate army to support him, he set out for the quarters of the Beni Mustalik, and before long reached Moraisi, where he encamped. The Beni Mustalik were deserted by their allies, and in the skirmish that followed Mahomet was easily successful. Their camp was plundered, their women and some of their men taken prisoner. The expedition was, however, provocative of two consequences which take up considerable attention in contemporary records, the quarrel between the Citizens and the Refugees, and the scandal regarding Ayesha.
The punishment of the Beni Mustalik had been effected, and nought remained but the division of the spoil. The captives had mostly been ransomed, but one, a girl, Juweira, remained sorrowfully with the Muslim, for her ransom was fixed so high that payment was impossible. Mahomet listened to her tale, and the loveliness of her face and figure did not escape him.