Therefore, brothers, stand firm and cling to the traditions we taught you, whether by speech or by letter.
Textus Receptus (TR) - 2 Thessalonians 2:15 >Ἄρα οὖν, ἀδελφοί, στήκετε, καὶ κρατεῖτε τὰς παραδόσεις ἃς ἐδιδάχθητε, εἴτε διὰ λόγου, εἴτε δι᾿ ἐπιστολῆς ἡμῶν.