Parashas Tetzaveh · Passuk 28:42
Chabad.org — English translation + Rashi
Torah Temimah points to Zevachim 18b.
Sefaria — Exodus 28:42
Sefaria — Zevachim 18b
E-Daf — Zevachim 18b
English: The Gemara derives several requirements from the repeated word “bad”: the priestly trousers are of linen, new, woven, made with sixfold threads, and worn alone rather than together with ordinary garments.
On the daf / in context: See the cited source for the full section.
Derash on the verse.
The repeated “bad” specifies the material, condition, construction, and exclusive character of the priestly trousers.