Matthew Poole and continuators on Romans 7:1

1 KNow ye not brethren, (for I speak to them that know the law) how that the law hath dominion over a man , as long as he liveth?

By the Law here he means the Law of Wedlock, or the Law of Moses about that matter, as appears by the instance given in the next verse.

The word Man here is common to both Sexes, and may be applyed to either, for both are subject to the aforementioned Law.

The Apostle having shewed in the former Chapter how Believers are freed from the Dominion of Sin. He proceeds in this Chapter, to declare, that they are free also from the Yoak of the Mosaical Law, because that was dead to them, and they to it. This he illustrates, and proceeds by the familiar Allegory of a Husband and his Wife: Look as a Wife is free from her Husband when he is dead, and may then marry another, and be no Adultress; So Believers are dead to the Law, and are free to be Married to another, even to Christ, that is raised from the dead, that upon their happy Marriage, they may bring forth fruit unto God.