TT #60 · Parshas Tazria · Aliyah 1 · Passuk 8
English: If, however, her means do not suffice for a sheep, she shall take two turtledoves or two pigeons, one for a burnt offering and the other for a purgation offering. The priest shall make expiation on her behalf, and she shall be pure.
Chabad.org — Chumash, English translation + Rashi for Vayikra 12:8
Torah Temimah cites Yerushalmi Shabbos 1:3 for the statement that cleanliness leads to purity.
Sefaria — Jerusalem Talmud Shabbos 1:3
English: Purity comes through cleanliness, as it is written: “And the priest shall make expiation for her, and she shall be pure.”
Textual order
Purity follows cleanliness: the Yerushalmi places ritual purity after cleanliness in the progression taught by Rabbi Pinchas ben Yair.