1 If you do something at someone's bidding, you do it because they have asked you to do it.
FORMAL
♦
at sb's bidding phrase
At his bidding, the delegates rose and sang the national anthem.
2 If you say that someone does another person's bidding, you disapprove of the fact that they do exactly what the other person asks them to do, even when they do not want to.
FORMAL
♦
do sb's bidding phrase V inflects (disapproval)
(=obey)
She is very clever at getting men to do her bidding!