Prophet Joseph - 12:80
"When they despaired of him, they went aside to consult. The elders said: "Do you not know that your father has taken a promise from you in the name of Allah, and that you have already transgressed in the case of Joseph? I will not leave this place until my father gives me permission or until Allah judges for me. He is the Best Judge."
Related:
Prophet Joseph/12:66
"I will not send him with you unless you give me a firm promise by Allah that you will bring him to me unless you are all surrounded and prevented. When they promised him, he said: "Allah is witness to what we say"."