Read Mark 12:28 Using Other Translations
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?
And one of the scribes came up and heard them disputing with one another, and seeing that he answered them well, asked him, "Which commandment is the most important of all?"
One of the teachers of religious law was standing there listening to the debate. He realized that Jesus had answered well, so he asked, “Of all the commandments, which is the most important?”