Mark 12:28 in the World English Bible
One of the scribes came and heard them questioning together, and knowing that he had answered them well, asked him, “Which commandment is the greatest of all?”
Context
27 He is not the God of the dead, but the God of the living: ye therefore do greatly err.
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?
29 And Jesus answered him, The first of all the commandments is, Hear, O Israel; The Lord our God is one Lord: