What is the antecedent of the pronoun **they** in the context below, from Byron's *The Bride of Abydos*, Canto I, stanza 5?

> He is an Arab to my sight, *  
 Or Christian crouching in the fight. – (145)  
 But hark! – I hear Zuleika’s voice,  
 Like Houris’ hymn it meets mine ear;  
 She is the offspring of my choice –  
 Oh! more than even her mother dear,  
 With all to hope, and nought to fear, (150)  
 My Peri! – ever welcome here!  
 Sweet, as the desart-fountain’s wave,  
 To lips just cooled in time to save –  
 Such to my longing sight art thou;  
 Nor can **they** waft to Mecca’s shrine (155)  
 More thanks for life, than I for thine  
 Who blest thy birth, and bless thee now.”

[Full poem here][1]


  [1]: http://www.newsteadabbeybyronsociety.org/works/downloads/turk_3.pdf