John 7:45; John 8:43; John 8:46; John 12:5; John 13:37

45 Then came the officers to the chief priests and Pharisees; and they said unto them, Why have ye not brought him?
43 Why do ye not understand my speech? even because ye cannot hear my word.
46 Which of you convinceth me of sin? And if I say the truth, why do ye not believe me?
5 Why was not this ointment sold for three hundred pence, and given to the poor?
37 Peter said unto him, Lord, why cannot I follow thee now? I will lay down my life for thy sake.