Vous avez cherché: labour is prayer (Anglais - Latin)

work is prayer
laborare est orare

she is hardened against her young ones, as though they were not hers: her labour is in vain without fear;
duratur ad filios suos quasi non sint sui frustra laboravit nullo timore cogent

therefore, my beloved brethren, be ye stedfast, unmoveable, always abounding in the work of the lord, forasmuch as ye know that your labour is not in vain in the lord.
itaque fratres mei dilecti stabiles estote et inmobiles abundantes in opere domini semper scientes quod labor vester non est inanis in domin

for there is a man whose labour is in wisdom, and in knowledge, and in equity; yet to a man that hath not laboured therein shall he leave it for his portion. this also is vanity and a great evil.
nam cum alius laboret in sapientia et doctrina et sollicitudine homini otioso quaesita dimittit et hoc ergo vanitas et magnum malu