Musar zu Ejchah 4:7

There is also another Midrash which describes the heifer as symbolizing Israel, comparing Israel to a stubborn, defiant cow. Again, also the word אדומה is interpreted by that Midrash as referring to Israel who are redder than pearls. תמימה refers to Israel who are compared to יונתי תמתי, "My perfect turtle dove," in Song of Songs 6,9. The words אשר אין בה מום, "which is totally unblemished," are also a reference to Israel, since the verse quoted above describes that turtle dove. In this way the words אשר לא עלה עליה עול, "which has never accepted a yoke," are a reference to Israel during the period of Jeremiah, when Israel refused to accept the Yoke of Heaven. This Midrash is almost the reverse of the Yalkut! Besides, why does the Midrash continually repeat the words "this refers to Israel?"