It's the Law of God, not the law of Moses. God gave the law/commands/instructions, not Moses. Saying "the law of Moses" shows a severe lack of understanding of the foundational books of the Bible. If you fail understand the first 5 books of the Bible and then you are going to have a hell of a time understanding what Paul wrote.
“Then he said, ‘I beg you therefore, father, that you would send him to my father’s house, for I have five brothers, that he may testify to them, lest they also come to this place of torment.’ Abraham said to him, ‘They have Moses and the prophets; let them hear them.’ And he said, ‘No, father Abraham; but if one goes to them from the dead, they will repent.’ But he said to him, ‘If they do not HEAR Moses and the prophets, neither will they be persuaded though one rise from the dead.’ ”
Luke 16:27-31
I just noticed this comment. Isn't "the Law of Moses" wording used extensively in both the Old and the New Testaments? I just did a cursory word search for that phrase and it appears over 30 times in both Testaments. So, who here as a serious lack of understanding of the foundational books of the Bible? Just like last year when you argued that Jesus wasn't indeed God. For which you later corrected yourself, thankfully. It seems to me that you like to quote verses out of context to prove your present talking points.