Matthew 17:17
And Jesus responding said: O, faithless and perverse generation, how long shall I be with you? bring him hither to me.
Matthew 17:20
and Jesus says to them, On account of your unbelief. For truly I say unto you, If you have faith as a grain of mustard seed, you will say to this mountain, Remove hence to yonder place; and it shall remove; and nothing shall be impossible to you.
Mark 8:17-18
And Jesus knowing says to them, Why do you reason because you have not bread? do you not yet know, nor understand? have you your heart still hardened?
Hebrews 12:5
and you have forgotten the exhortation which reasoneth with you as with sons, My son regard not lightly the chastening of the Lord, nor faint when thou art proven of him: