1)
Why does the Torah write "Avanim Acheros" in the plural?
1.
Sifra: To teach us that the owner must build at least two stones into the wall. 1
1
See Torah Temimah, note 151.
2)
What are the implications of "Avanim Acheros"?
1.
Sifra: It implies other stones, and not stones that the owner takes from another part of the house.
3)
Why is "ve'Afar Acher Yikach ve'Tach es ha'Bayis written in the singular?
1.
Sifra: Because the neighbor is not obligated to assist in the plastering of the owner's house. 1
1
See Oznayim la'Torah as to why.
4)
Why does the Torah add the word "Afar Acher"?