Matthew 28:10

Be not afraid - They were seized with fear at the sight of the angel; and this was now renewed by this unexpected appearance of Christ. See the note on Matthew 28:8 .

Go, tell my brethren - This is the first time our Lord called his disciples by this endearing name: they no doubt thought that their Lord would reproach them with their past cowardice and infidelity; but, in speaking thus, he gives them a full assurance, in the most tender terms, that all that was passed was as buried for ever.