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.”