John Mark
Mark 12:29ESV·traditional attribution

Jesus answered, “The most important is, ‘Hear, O Israel: The Lord our God, the Lord is one.

Matthew Henry Presbyterian @wholebiblehenry

The scribes and Pharisees were (however bad otherwise) enemies to the Sadducees; now one would have expected that, when they heard Christ argue so well against the Sadducees, they would have countenanced him, as they did Paul when he appeared against the Sadducees (Act 23:9); but it had not the effect: because he did not fall in with them in the ceremonials of religion, he...

Commenting on Mark 12:28-34

John Gill Reformed Baptist @doctorgill

And the second is like,.... "Unto it", as in Mat 22:39 and so it is read here in two ancient copies of Beza's, and in the Vulgate Latin, Syriac, Arabic, Persic, and Ethiopic versions; namely this, thou shalt love thy neighbour as thyself.

Albert Barnes Presbyterian @notesbybarnes

Verse 29. Hear, O Israel. This was said to call the attention of the to the great importance of the truth about to be proclaimed. See . The Lord our God, etc. Literally, "Jehovah, our God, is one Jehovah." The other nations worshipped many gods, but the God of the Jews was one, and one only.