He that reckons without his host must reckon again.
Meaning: Failing to consult those involved in plans leads to miscalculation and necessary revision.
Origin: From 'A Dictionary of English Proverbs and Proverbial Phrases' (1870). Public domain.
Translations
- French: Qui compte sans son hôte, compte deux fois (literally: He that reckons without his host must reckon again)
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