Which line in this excerpt from act I of Shakespeare’s Romeo and Juliet contains alliteration?

ROMEO: Like a rich jewel in an Ethiope's ear;
So shows a snowy dove trooping with crows,
As yonder lady o'er her fellows shows.
The measure done, I'll watch her place of stand,
And, touching hers, make blessed my rude hand.
Did my heart love till now? forswear it, sight!
For I ne'er saw true beauty till this night.