Bilangan 22:28-29

22:28 Then the Lord opened the mouth of the donkey, and she said to Balaam, “What have I done to you that you have beaten me these three times?” 22:29 And Balaam said to the donkey, “You have made me look stupid; I wish ¹  there were a sword in my hand, for I would kill you right now.”

[22:29]  ¹ tn The optative clause is introduced with the particle לוּ (lu).