Which lines in this excerpt from act I of Shakespeare's Romeo and Juliet foreshadow Romeo’s fate?

TYBALT: This, by his voice, should be a Montague.
Fetch me my rapier, boy. What dares the slave
Come hither, cover'd with an antic face,
To fleer and scorn at our solemnity?
Now, by the stock and honour of my kin,
To strike him dead, I hold it not a sin.

CAPULET: Why, how now, kinsman! wherefore storm you so?

TYBALT: Uncle, this is a Montague, our foe,
A villain that is hither come in spite,
To scorn at our solemnity this night.

CAPULET: Young Romeo is it?

TYBALT: 'Tis he, that villain Romeo.

CAPULET: Content thee, gentle coz, let him alone;
He bears him like a portly gentleman;
And, to say truth, Verona brags of him
To be a virtuous and well-govern'd youth: