SEV Biblia, Chapter 6:18
Porque Juan decía a Herodes: No te es lícito tener la mujer de tu hermano.
John Gill's Bible Commentary
Ver. 18. For John had said unto Herod , etc..] He had been personally with him, and had plainly and freely told him of his sin, and faithfully reproved him for it; alleging what he had done was contrary to the law of God: it is not lawful, for thee to have thy brother's wife : (see Gill on Matthew 14:4).
Matthew Henry Commentary
Verses 14-29 - Herod feared John while he lived, and feared him still more when he wa dead. Herod did many of those things which John in his preaching taugh him; but it is not enough to do many things, we must have respect to all the commandments. Herod respected John, till he touched him in his Herodias. Thus many love good preaching, if it keep far away from their beloved sin. But it is better that sinners persecute ministers now for faithfulness, than curse them eternally for unfaithfulness. The ways of God are unsearchable; but we may be sure he never can be at a loss to repay his servants for what they endure or lose for his sake. Deat could not come so as to surprise this holy man; and the triumph of the wicked was short.
Greek Textus Receptus
ελεγεν 3004 5707 V-IAI-3S γαρ 1063 CONJ ο 3588 T-NSM ιωαννης 2491 N-NSM τω 3588 T-DSM ηρωδη 2264 N-DSM οτι 3754 CONJ ουκ 3756 PRT-N εξεστιν 1832 5904 V-PQI-3S σοι 4671 P-2DS εχειν 2192 5721 V-PAN την 3588 T-ASF γυναικα 1135 N-ASF του 3588 T-GSM αδελφου 80 N-GSM σου 4675 P-2GS
Robertson's NT Word Studies
6:18 {Thy brother's wife} (ten gunaika tou adelfou). While the brother was alive (#Le 18:16; 20:21). After a brother's death it was often a duty to marry his widow.