Rashi on Genesis 30:42/רש"י על בראשית ל׳:מ״ב

1ובהעטיף WHEN THE FLOCKS WERE FEEBLE — the word has the meaning of “being late”, as the Targum renders it בלקישות the late-bearing ones (cf. מלקוש the “latter” rain). Menachem classifies it under the same root as (Isaiah 3:22) “the aprons and the mantelets (המעטפות)”, so that it has the meaning of wrapping oneself in a garment, and the word denotes those animals that are well wrapped up in their skin and fur so that they do not desire to be warmed by the males.