Dorn, I'm forewarned, an' that's forearmed.
"The Desert of Wheat"
Zane Grey
"That is all," concluded John, "and I have come straight to you, for forewarned is forearmed.
"The Man from Jericho"
Edwin Carlile Litsey
On the whole, it was fortunate that the note had fallen into his possession, for forewarned was forearmed.
"The Gray Phantom's Return"
Herman Landon