John Gill Commentary Luke 20:39

"And certain of the scribes answering said, Teacher, thou hast well said." — Luke 20:39 (ASV)

Then certain of the Scribes, answering said Who believed the doctrine of the resurrection, which the Sadducees denied, and so were pleased with our Lord's reasoning on this subject: master, you have well said, you have spoken in a beautiful manner, reasoned finely upon this head, and set this matter in a fair and clear light; (See Gill on Mark 12:28)