1 Corinthians 4:12

4:12 We do hard work, toiling with our own hands. When we are verbally abused, we respond with a blessing, when persecuted, we endure,

1 Corinthians 4:17

4:17 For this reason, I have sent Timothy to you, who is my dear and faithful son in the Lord. He will remind you of my ways in Christ, ¹  as I teach them everywhere in every church.

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¹ tc ‡ Several important mss read ᾿Ιησοῦ (Ihsou, “Jesus”) after Χριστῷ (Cristw, “Christ”) in v. 17 (so Ì⁴⁶ א C D¹ 33 1739 al). Western mss have κυρίῳ ᾿Ιησοῦ (kuriw Ihsou, “Lord Jesus”; D* F G), while several significant mss, as well as the majority, have only Χριστῷ here (A B D² Ψ Ï sa). Once ᾿Ιησοῦ got into the text, it would continue to be copied. There is however no easy explanation for the word lacking in so many witnesses. Thus the shorter reading appears to be original. NA²⁷ includes ᾿Ιησοῦ in brackets, indicating doubt as to its authenticity.