Ah, this is William Shakespeare's play Romeo and Juliet we are talking about here, right? In William Shakespeare's play there is no depiction of the wedding ceremony at all. Therefore we cannot know what the Friar might or might not have said during the ceremony. There is a scene (Act II Scene 6) which takes place just before the ceremony, and during the scene he says two things while Romeo and Juliet are both there: "Romeo shall thank thee, daughter, for us both." and "Come, come with me, and we will make short work, for, by your leaves, you shall not stay alone till holy church incorporate two in one." Neither of these is a warning. After saying the second line, they all leave together, presumably to enter the church where the wedding ceremony will take place.
He did not get the message to Romeo that said that Juliet was not truly dead (yet)
Friar Laurence is the friar who marries Romeo and Juliet.
Friar Lawerence's plan was for Romeo to take Juliet away to Mantua with him where they could live together.
Friar Lawerence
Romeo, Juliet, the Prince, Benvolio and Friar Lawerence. There are probably many others but those are the main ones.
Friar Laurence hesitates to marry Romeo and Juliet because just days before Romeo was infatuated with Rosaline, who did not return him her love.
Friar Laurence is the friar who marries Romeo and Juliet.
No, he is forgiven.
Friar Lawerence's plan was for Romeo to take Juliet away to Mantua with him where they could live together.
Friar Lawerence
Romeo, Juliet, the Prince, Benvolio and Friar Lawerence. There are probably many others but those are the main ones.
Friar Laurence hesitates to marry Romeo and Juliet because just days before Romeo was infatuated with Rosaline, who did not return him her love.
Romeo, Juliet, Lord Capulet, Lady Capulet, Friar Lawerence, Nurse, Tybalt, Mercutio, Benvolio
Friar Laurence hopes that if he marries Romeo and Juliet that the feud with their families with end. Little did he know that will not happen until they are no longer living.
Friar Laurence married off Romeo and Juliet.
Friar Lawrence married Romeo and Juliet in his cell.
In Act 2, Scene 3 of Romeo and Juliet, the event where Friar Laurence agrees to marry Romeo and Juliet takes place last in his cell.
Juliet, Romeo, Tybalt, Nurse, Benvolio Or . . . Juliet, Romeo, Friar Lawrence, Nurse, Capulet Or . . . Juliet, Romeo, Friar Lawrence, Capulet, Tybalt Or . . . Juliet, Romeo, Capulet, Mercutio, Tybalt Or basically Romeo and Juliet and any three of Nurse, Friar, Capulet, Mercutio, or Tybalt.