This is in Persian, but the calligraphy looks more typical of Ottoman metalwork: 
 
بکش خنجر که جان بهر تو [ا]ی نامهربان دارم 
 
'Draw the dagger, since my life is at your disposal, O unkind one!' 
 
The imagery is typical of the Ottoman and Persian poetic traditions, where the poet emphasises his devotion to a cruel beloved, even asking to be killed in order to demonstrate his devotion.
		 
		
		
		
		
		
		
		
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