We found "be earnest" used in 1 sacred songs, each carrying a unique message of faith.
be earnest
...To His will I’d gladly bow.
O ye saints, arouse, be earnest,
Up and work while yet ’tis day;...
To His will I’d gladly bow.
O ye saints, arouse, be earnest,
Up and work while yet ’tis day;
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