The History Of Herodotus Volume 1 of 2
Page: 8518. Moreover also the answer given by the Oracle of Ammon bears witness in support of my opinion that Egypt is of the extent which I declare it to be in my account; and of this answer I heard after I had formed my own opinion about Egypt. For those of the city of Marea and of Apis, dwelling in the parts of Egypt which border on Libya, being of opinion themselves that they were Libyans and not Egyptians, and also being burdened by the rules of religious service, because they desired not to be debarred from the use of cows' flesh, sent to Ammon saying that they had nought in common with the Egyptians, for they dwelt outside the Delta and agreed with them in nothing; and they said they desired that it might be lawful for them to eat everything without distinction. The god however did not permit them to do so, but said that that land which was Egypt which the Nile came over and watered, and that those were Egyptians who dwelling below the city of Elephantine drank of that river. Thus it was answered to them by the Oracle about this:
19, and the Nile, when it is in flood, goes over not only the Delta but also of the land which is called Libyan and of that which is called Arabian sometimes as much as two days' journey on each side, and at times even more than this or at times less.
As regards the nature of the river, neither from the priests nor yet from any other man was I able to obtain any knowledge: and I was desirous especially to learn from them about these matters, namely why the Nile comes down increasing in volume from the summer solstice onwards for a hundred days, and then, when it has reached the number of these days, turns and goes back, failing in its stream, so that through the whole winter season it continues to be low, and until the summer solstice returns. Of none of these things was I able to receive any account from the Egyptians, when I inquired of them what power the Nile has whereby it is of a nature opposite to that of other rivers. And I made inquiry, desiring to know both this which I say and also why, unlike all other rivers, it does not give rise to any breezes blowing from it.
20. However some of the Hellenes who desired to gain distinction for cleverness have given an account of this water in three different ways: two of these I do not think it worth while even to speak of except only to indicate their nature; of which the one says that the Etesian Winds are the cause that makes the river rise, by preventing the Nile from flowing out into the sea. But often the Etesian Winds fail and yet the Nile does the same work as it is wont to do; and moreover, if these were the cause, all the other rivers also which flow in a direction opposed to the Etesian Winds ought to have been affected in the same way as the Nile, and even more, in as much as they are smaller and present to them a feebler flow of stream: but there are many of these rivers in Syria and many also in Libya, and they are affected in no such manner as the Nile.