2 Thessalonians 1:11

To which end we also pray always for you, that our God may count you worthy of your calling, and fulfill every desire of goodness and every work of faith, with power;

Every work of faith ... See under 2 Thessalonians 1:3, above, for discussion of "the work of faith"; the new thought here is that even when Christians do the works required by faith it is actually God who supplies the spiritual energy for them to do it, thus referring all the glory unto God.