NET
28 Now one of the experts in the law came and heard them debating. When he saw that Jesus answered them well, he asked him, “Which commandment is the most important of all?”
Darby
28 And one of the scribes who had come up, and had heard them reasoning together, perceiving that he had answered them well, demanded of him, Which is [the] first commandment of all?
KJV
28 And one of the scribes came, and having heard them reasoning together, and perceiving that he had answered them well, asked him, Which is the first commandment of all?