no sooner said than done

no sooner said than done idiom
Accomplished immediately, as in He said we should leave and, no sooner said than done. This expression employs no sooner ... than in the sense of “at once,” a usage dating from the mid-1500s.

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.

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