Vous avez cherché: nihil ultra vires (Latin - Anglais)

ultra vires
beyond the powers

visum est enim spiritui sancto et nobis nihil ultra inponere vobis oneris quam haec necessari
for it seemed good to the holy ghost, and to us, to lay upon you no greater burden than these necessary things;

stulto labore consumeris et tu et populus iste qui tecum est ultra vires tuas est negotium solus illud non poteris sustiner
thou wilt surely wear away, both thou, and this people that is with thee: for this thing is too heavy for thee; thou art not able to perform it thyself alone.