What is the meaning of "Kol Kabel Di Min Kadam Malka v'Shiv'as Ya'atohi Sheli'ach"?
Rashi: For this, you are sent from the king and his seven advisors, who see his face.
What is "Levakarah Al Yehud"?
Rashi: To investigate and check on the Jews in Yerushalayim, if they engage in Hashem's Torah.
Malbim: This is one of the two reasons why you are sent - to check on the Jews in matters of the creed. You will teach to them, strengthen them and spread the light of Torah and Yir'as Hashem among them. If so, anyone how wants to go with you to learn Torah and Emunah in Ir ha'Kodesh has permission. Also refer to 7:15:1:1-2.
What is "vi'Ydach"?
Rashi: Hashem's Torah is in your hand.
