1)
Who commanded him bi'Dvar Hashem"?
1.
Radak: An angel.
2)
Why did Hashem command him not to eat or drink?
1.
Radak: One may enter a city of idolaters only to warn them, stop them or speak to them in the name of Hashem. People should see that he entered only to tell his Nevu'ah.
3)
Why did Hashem command him not to return the same way he came?
1.
Radak: It is lest he remember the way to the place and return to there.
