Parashas Vayakhel · Passuk 35:1
Torah Temimah points to classical source on this unit (verified).
English: Rabbi teaches that “things, the things, these things” refers to the thirty-nine labors that were told to Moshe at Sinai.
Derash on repeated wording: “דברים הדברים אלה הדברים” points to the thirty-nine labors.
The threefold wording of “the things” is expounded as referring to the thirty-nine categories of labor of Shabbos.