@iamjessklein Etymology is a little shaky but it's said that James Howell, a historian and writer, used the phrase in a book called called Paramoigrap

@iamjessklein Etymology is a little shaky but it's said that James Howell, a historian and writer, used the phrase in a book called called Paramoigraphy (Proverbs), 1659:

"No weeping for shed milk."This would make the phrase at least over 350 years old.