The New John Gill Exposition of the Entire BibleGenesis 47:8
And Pharaoh said unto Jacob, how old [art] thou?
] Or, "how many
are the days of the years of thy life?" which way of speaking Jacob
takes up, and very pertinently makes use of in his answer that follows:
Dr. Lightfoot F13 thinks Pharaoh had never seen so old a man before, so
grave a head, and so grey a beard, and in admiration asked this
F13 Works, vol. 1. p. 667.