You must be thinking of the end of Act III Scene 1 where Antony advises Octavius, who is Caesar's nephew and adopted son, to stay out of Rome for the present. Antony sends Lepidus as a messenger in Act IV Scene 1 to Caesar's house to get a copy of the will. Antony is not around in the other three Scene Ones in the play.
Antony
Caesar told Marc Antony to come to his right side in Act One, Scene two. Caesar did this because he was deaf on his left ear.
Antony offered Caesar a crown and he refused it.
That Rome will be a total chaos.
Mark Antony says it in Act 3 Scene 1 of Julius Caesar, just after Brutus has given him leave to speak at Caesar's funeral.
To explain the reasons for Caesar's death
Antony
In Shakespeare's play Julius Caesar, the murder of Caesar takes place in Act III Scene i. Act III Scene ii is the scene containing Caesar's funeral and Antony's famous speech, "Friends, Romans, Countrymen"
The message that Mark Antony sends to Octavius in Act III, Scene 2 of Julius Caesar is saying that he has dealt with the death of Caesar properly and held a proper funeral for Caesar. Octavius, being Caesars' son would want to be informed of his fathers death.
The target was Caesar, and Antony was diverted away from the scene when the assassination took place.
That caesar didnt deserve to be murdered
Caesar told Marc Antony to come to his right side in Act One, Scene two. Caesar did this because he was deaf on his left ear.
Antony offered Caesar a crown and he refused it.
The reasons for Caesar's death
(Apex) That Caesar didn't deserve to be murdered.
(Apex) Because of Caesar's ambition.
(Apex) That he is upset about Caesar's death.