با طناب/ریسمان کسی به چاه رفتن
Meanings of "با طناب/ریسمان کسی به چاه..."
Lit. to go into the well with someone's rope
To trust someone and do what they say. Usually is used in negative form: do not go into the well with his/her rope. Means do not trust him/her
به کسی اعتماد کردن و به حرفِ او عمل کردن