तत्सहायैरनुगतैर्नानाकर्मप्रवेदिभिः । विद्यादुत्सादयेच्चैव निपुणैः पूर्वतस्करैः ॥ २६७ ॥
By the means of clever reformed thieves, who associate with such (rogues), follow them and know their various machinations, he must detect and destroy them.
english translation