at the hands of
US /æt ðə hændz ʌv/
UK /æt ðə hændz ʌv/

1.
per mano di, ad opera di
done or caused by someone
:
•
The old castle was destroyed at the hands of invaders.
Il vecchio castello fu distrutto per mano degli invasori.
•
She suffered a great injustice at the hands of her former employer.
Ha subito una grande ingiustizia per mano del suo ex datore di lavoro.