Matthew 6:30
6:30 And if this is how God clothes the wild grass, which is here today and tomorrow is tossed into the fire to heat the oven, won’t he clothe you even more, you people of little faith?
Matthew 8:26
8:26 But he said to them, “Why are you cowardly, you people of little faith?” Then he got up and rebuked the winds and the sea, and it was dead calm.
Matthew 14:31
14:31 Immediately Jesus reached out his hand and caught him, saying to him, “You of little faith, why did you doubt?”
Mark 16:14
16:14 Then he appeared to the eleven themselves, while they were eating, and he rebuked them for their unbelief and hardness of heart, because they did not believe those who had seen him resurrected.