Nehemiah 4:17

With one of his hands wrought in the work , and with the other hand held a weapon - That is, he had his arms at hand, and was as fully prepared to fight as to work. So Ovid, Epist. xi., Canace Macario, ver. 1: -

Si qua tamen caecis errabunt scripta lituris,

Oblitus a dominae caede libellus erit:

Dextra tenet calamum; strictum tenet altera ferrum:

Et jacet in gremio charta soluta meo