Measure twice, cut once


English Proverb

(carpentry, literally) One should double-check one's measurements for accuracy before cutting a piece of wood; otherwise it may be necessary to cut again,
wasting time and material.  [quotations ▼]

1872, "Dressmaking," Hall's Journal of Health, vol. 19, no. 12, p. 280: Look at Carpenters! . . . In old times it was a  proverb "Measure twice, and cut once."

(figuratively, by extension)
Plan and prepare in a careful, thorough manner before taking action.  



Never cut twice!
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