stitch in time, a - Phrases/Idioms
The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
A prompt action will avert more serious trouble. For example, Changing the car's oil every 7,000 miles is a stitch in time. The complete form of this adage, a stitch in time saves nine, appeared in Thomas Fuller's 1732 proverb collection, Gnomologia, and is so well known that it often is stated in shortened form. Ogden Nash played with it in the title for his verse collection, A Stitch Too Late Is My Fate (1938).