45 Then opened he their understanding, that they might the scriptures.
46 And said unto them, Thus it is written, and thus it behoved Christ to suffer, and to rise from the dead on the third day:
47 And that repentance and remission of sins should be preached in his name among all nations beginning at Jerusalem.
48 And ye are witnesses of these things.
49 And behold, I send the promise of my Father upon you: but tarry ye in the city of Jerusalem, until ye be endued with power from on high.
Connect the dots, context, context, context. It all connects to Acts 2:38 . When you obey Acts 2:38 you obey Matthew 28:19.