And when Jesus saw a crowd came running together, he rebuked the unclean spirit saying to it, “You mute and deaf spirit, I command you, come out of him and never enter him again.” And after crying out and convulsing him terribly, it came out, and the boy was like a corpse, so that most of them said, “He is dead.” But Jesus took him by the hand and lifted him up, and he arose. And when he had entered the house, his disciples asked him privately, “Why could we not cast it out?” And he said to them, “This kind cannot be driven out by anything but prayer.” – Mark 9.25-29
Nowhere is there a hint of rebuke for failure from Jesus. Instead, we read the disciples asked and received the answer they needed. Brother, is there a tough spot requiring an answer you need? Why not ask?