By her general conduct, actions, and even by appearances she was anything but a fisherwoman. Just as the central cord in a violin is conspicuous, similarly Noori was a queen among queens. Obviously she had received the queenliness at her very birth (and was therefore a born queen). Samo had realized her worth and therefore tied the string round her wrist (as an evidence of his approval and acceptance).
Note: This verse may be referring to the worthiness of the Apostle of Islam for his high post.

Her hands and feet, her face and from never has that of a fisher-maid been,
Like the main string in the violin, she was a queen among queens,
From her infancy, she behaved like a royal being,
Cognizant of that, Samo tied on her arm, the matrimonial string.'

She was, in no way, by appearance of behaviour, a fisher girl,
As is the queen string among other strings
in a violin, she was among the queens,
She was queenly, right from her birth,
Recognizing her thus, the king tied a string
round her wrist.