We found one dictionary that defines the word proverbs should go in pairs:

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1. proverbs should go in pairs: Wiktionary

▸ Words similar to proverbs should go in pairs ▸ Usage examples for proverbs should go in pairs ▸ Idioms related to proverbs should go in pairs ▸ Wikipedia articles (New!) ▸ Words that often appear near proverbs should go in pairs ▸ Rhymes of proverbs should go in pairs ▸ Invented words related to proverbs should go in pairs