ESV: So then, brothers, stand firm and hold to the traditions that you were taught by us, either by our spoken word or by our letter.
NIV: So then, brothers and sisters, stand firm and hold fast to the teachings we passed on to you, whether by word of mouth or by letter.
NASB: So then, brothers and sisters, stand firm and hold on to the traditions which you were taught, whether by word of mouth or by letter from us.
CSB: So then, brothers and sisters, stand firm and hold to the traditions you were taught, whether by what we said or what we wrote.
NLT: With all these things in mind, dear brothers and sisters, stand firm and keep a strong grip on the teaching we passed on to you both in person and by letter.
KJV: Therefore, brethren, stand fast, and hold the traditions which ye have been taught, whether by word, or our epistle.
NKJV: Therefore, brethren, stand fast and hold the traditions which you were taught, whether by word or our epistle.