'Tower' in the Bible

Behold, therefore I am against thee, and against thy rivers, and I will make the land of Egypt utterly waste and desolate, from the tower of Syene even unto the border of Ethiopia.

Thus saith the LORD; They also that uphold Egypt shall fall; and the pride of her power shall come down: from the tower of Syene shall they fall in it by the sword, saith the Lord GOD.