go the way of all flesh
Die, as in Our dog's gone the way of all flesh and I'm not sure we'll get another. This expression is actually a misquotation from the Bible, which has it to go the way of all the earth (I Kings 2:2; Joshua 22:14), also meaning “to die.”
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.