He crouched, he lay down like a lion, and like a lioness — who will rouse him? Those who bless you are blessed, and those who curse you are cursed.
Torah Temimah: Sanhedrin 105a — Mar son of Ravina: Bilam had relations with his donkey.
English: Mar son of Ravina said: Bilam had relations with his she-donkey. It is written here, “he crouched, he lay,” and it is written there [Judges 5:27], “between her feet he crouched, he fell, he lay.”
Gezeirah shavah on כרע שכב exposing moral corruption.
The same language used of Israel’s lion-rest is turned, by parallel, into an indictment of Bilam’s own conduct with the donkey.