The Apostle Paul
Romans 13:9BSB·traditional attribution

The commandments “Do not commit adultery,” “Do not murder,” “Do not steal,” “Do not covet,” and any other commandments, are summed up in this one decree: “Love your neighbor as yourself.”

John Calvin Reformed @genevareformer

9. For this, Thou shalt not commit adultery, etc. It cannot be from this passage concluded what precepts are contained in the second table, for he subjoins at the end, and if there be any other precept He indeed omits the command respecting the honoring of parents; and it may seem strange, that what especially belonged to his subject should have been passed by.

Matthew Henry Presbyterian @wholebiblehenry

We are here taught a lesson of justice and charity. I. Of justice (Rom 13:7): Render therefore to all their dues, especially to magistrates, for this refers to what goes before; and likewise to all with whom we have to do. To be just is to give to all their due, to give every body his own.

Commenting on Romans 13:7-10

John Gill Reformed Baptist @doctorgill

For this, thou shalt not commit adultery,.... The apostle here reckons up the several laws of the second table, with this view, that it might appear that so far as a man loves his neighbour, whether more near or distantly related, he fulfils the law, or acts according to it.