Vincent's NT Word Studies
34. Whosoever committeth (pav o poiwn). Rev., more correctly, every one that committeth.Sin (thn amartian). The definite article, the sin, shows that Jesus does not mean merely a simple act, but a life of sin. Compare 1 John iii. 4-8, and doeth the truth (John iii. 21); doeth the righteousness (1 John ii. 29). The servant (doulov). Or, a servant. Properly, a bond-servant or slave. See on Matt. xx. 26.
Of sin. A few authorities omit, and read whosoever committeth sin is a bond-servant. Compare Rom. vi. 17, 20.