“From the slave of Allah, ‘Umar, Amirul Muminin, to the Nile of the people of Egypt. To proceed: If you only flow on your own initiative, then do not flow, for we have no need of you. But if you only flow on the command of Allah, the One, the Subduer, and He is the One Who causes you to flow, then we ask Allah, may He be exalted, to make you flow.”... ...(Tarikh Ibn ‘Asakir, vol.44 pg.336 -Darul Fikr edition- and Al-Muntazam fit Tarikh of Ibnul Jawzi, vol.4 pg.294, Al-Bidayah wan-Nihayah)