Matthew
Matthew 28:20BSB·traditional attribution

and teaching them to obey all that I have commanded you. And surely I am with you always, even to the end of the age.”

John Calvin Reformed @genevareformer

Matthew 28:20. Teaching them to observe all things. By these words, as I have formerly suggested, Christ shows that, in sending the apostles, he does not entirely resign his office, as if he ceased to be the Teacher of his Church; for he sends away the apostles with this reservation, that they shall not bring forward their own inventions, but shall purely and faithfully deliver...

John Gill Reformed Baptist @doctorgill

Teaching them to observe all things,.... All ordinances, not only baptism, but the Lord's supper; all positive institutions, and moral duties; all obligations, both to God and men; all relative duties that respect the world, or one another, those that are without, and those that are within; and these are to be taught them, and therefore to be insisted on in the ministry of the...

Albert Barnes Presbyterian @notesbybarnes

Verse 20. Lo, I am with you. That is, by my Spirit, my providence, my attending counsel and guidance. I will strengthen, assist, and guide you. This also proves that Christ is Divine. If a mere man, or a creature of the highest order, how could he promise to be with his disciples always--or at all? They would be scattered far and wide. His disciples would greatly increase.