2 Tesalonicenses 2
King James Version
15Therefore, brethren, stand fast, and hold the traditions which ye have been taught, whether by word, or our epistle.
Reina-Valera 1909
15Así que, hermanos, estad firmes, y retened la doctrina que habéis aprendido, sea por palabra, ó por carta nuestra.
World English Bible
15So then, brothers, stand firm and hold the traditions which you were taught by us, whether by word or by letter.