1)
How would a Rasha ambush a Tzadik's dwelling?
1.
R. Yonah: If you see a Tzadik faltering (financially), do not ambush his dwelling, to say 'when will he sell it, and I will buy it!'
2.
Malbim: He ambushes due to coveting money; he wants to plunder his house.
2)
What is the meaning of "Al Teshaded Rivtzo"?
1.
R. Yonah: If [the Tzadik] was exiled due to his poverty and straits, do not plunder the place where he lies, to say that he will not return to his house.
2.
Malbim: Ambush due to vengeance or envy, to plunder his lying and rest.