Passage Numbers 22:27–28
The first of a list of passages the argument calls absurd: a donkey speaks to Balaam, Numbers 22:27-28. The point is that a story of an animal holding a conversation with a man is hard to accept as sober history.
When the donkey saw the angel of the LORD, she lay down under Balaam. And Balaam’s anger was kindled, and he struck the donkey with his staff. Then the LORD opened the mouth of the donkey, and she said to Balaam, “What have I done to you, that you have struck me these three times?”
Numbers 22:27-28
Source: see Credits and references (no. 3, p. 5).