A.T. Robertson Commentary Matthew 10:26

"Fear them not therefore: for there is nothing covered, that shall not be revealed; and hid, that shall not be known." — Matthew 10:26 (ASV)

Fear them not therefore (μη ουν φοβηθητε αυτους). Repeated in verses 28 and 31 (μη φοβεισθε present middle imperative here in contrast with aorist passive subjunctive in the preceding prohibitions). Note also the accusative case with the aorist passive subjunctive, transitive though passive. See same construction in Lu 12:5. In Mt 10:28 the construction is with απο and the ablative, a translation Hebraism as in Lu 12:4 (Robertson, Grammar of the Greek N.T. in the Light of Historical Research, p. 577).