18 Thus John was repeatedly saying to (or: in regard to) Herod, "It is not proper, permissible or lawful (= it violates custom and Torah) for you to continue having and holding (possessing) your brother's wife."
Mark 6:18 Cross References - JMNT
Matthew 14:3-4
Acts 20:26-27
26 "Hence (or: Because of this) I am now testifying to you men – in this very day – that I continue being clean from the blood of all humanity,
27 "for you see, I did not draw back from recounting to you folks all the purpose, will and counsel of God (or: from the [situation] to at some point announce again all God's design and determination for you people).
Acts 24:24-26
24 So after some days, Felix, happening by with Drusilla his wife – [she] being a Jewess, sent for Paul and then heard from him about the faith, trust and loyalty [being placed] into Christ Jesus (or: [the] Anointed Jesus; = Jesus the Messiah).
25 Yet during his dialoging and discoursing about fairness and equity (rightwised behavior and right relationships within the Way pointed out; also: = covenant inclusion and participation), inner strength and self-control, and then the impending effect of judgment (separation which is about to result in a decision), Felix – coming to be alarmed with inner fear – gave a decided response: "For the present, be now going your way while continuing to hold this [subject]. Now then, upon getting a fitting opportunity with [you], I will keep on calling for you,"
26 – at the same time continuing in expecting that money (or: the effect of something useful; = a bribe) will be given to him by Paul, on account of which, repeatedly sending for him even more frequently, he kept on conversing with him.