Herodotus on Khafre
This Cheops, the Egyptians said, reigned fifty years; and after he was dead his brother Chephren succeeded to the kingdom. This king followed the same manner of dealing as the other, both in all the rest and also in that he made a pyramid, not indeed attaining to the measurements of that which was built by the former (this I know, having myself also measured it), and moreover there are no underground chambers beneath nor does a channel come from the Nile flowing to this one as to the other, in which the water coming through a conduit built for it flows round an island within, where they say that Cheops himself is laid: but for a basement he built the first course of Ethiopian stone of divers colours; and this pyramid he made forty feet lower than the other as regards size, building it close to the great pyramid. These stand both upon the same hill, which is about a hundred feet high. And Chephren they said reigned fifty and six years. Here then they reckon one hundred and six years, during which they say that there was nothing but evil for the Egyptians, and the temples were kept closed and not opened during all that time. These kings (i.e. Khufu and Khafre) the Egyptians by reason of their hatred of them are not very willing to name; nay, they even call the pyramids after the name of Philitis the shepherd, who at that time pastured flocks in those regions.
Sources: Herodotus, Histories II,127 translated by G.C. Macauley Project Gutenberg