Parallel
2 Thessalonians 2:15
Nestle 1904 Greek New Testament · Berean Standard Bible
Ἄρα οὖν ἀδελφοί στήκετε καὶ κρατεῖτε τὰς παραδόσεις ἃς ἐδιδάχθητε εἴτε διὰ λόγου εἴτε δι’ ἐπιστολῆς ἡμῶν
Therefore, brothers, stand firm and cling to the traditions we taught you, whether by speech or by letter.