1)
Why does it say "va'Yashkef Aravnah"?
1.
Rashi: He had been hiding from the angel, like it says in Divrei ha'Yamim I, 21:20. Malbim - this is like "Chavi Kim'at Rega" (Yeshayah 26:20). He looked out of the window, and saw David.
2)
What is the meaning of "Apav Artzah"?
1.
Radak: This is like Al Apav (on his face).
