Matthew Poole and continuators on Romans 7:2

2. For the woman which hath an husband, is bound by the law to her husband so long as he liveth: but if the husband be dead, she is loosed from the Law of her husband .

He here exemplifyes and illustrates the foregoing assertion.

See a parallel place, 1 Cor. 7.39. This is the general rule, yet there is an exception in the case of Fornication or Desertion. vid, Mat. 5.32. 1 Cor. 7.15.

From the obligation of the Law of marriage.