His dying speech to his children is celebrated by the Arabians as a model of eloquence and wisdom: he deplored the errors of his youth but if the penitent was still infected by the vanity of a poet, he might exaggerate the venom and mischief of his impious compositions.
From his camp in Palestine, Amrou had surprised or anticipated the caliph's leave for the invasion of Egypt.

The magnanimous Omar trusted in his God and his sword, which had shaken the thrones of Chosroes and Caesar: but when he compared the slender force of the Moslems with the greatness of the enterprise, he condemned his own rashness, and listened to his timid companions.

The pride and the greatness of Pharaoh were familiar to the readers of the Koran; and a tenfold repetition of prodigies had been scarcely sufficient to effect, not the victory, but the flight, of six hundred thousand of the children of Israel: the cities of Egypt were many and populous; their architecture was strong and solid; the Nile, with its numerous branches, was alone an insuperable barrier; and the granary of the Imperial city would be obstinately defended by the Roman powers.

In this perplexity, the commander of the faithful resigned himself to the decision of chance, or, in his opinion, of Providence.

At the head of only four thousand Arabs, the intrepid Amrou had marched away from his station of Gaza when he was overtaken by the messenger of Omar.