Luke 11:16 And others, tempting him, sought of him a sign from heaven.
John 4:48 Then said Jesus unto him, Except ye see signs and wonders, ye will not believe.
Hebrews 4:15-16 For we have not an high priest which cannot be touched with the feeling of our infirmities; but was in all points tempted like as we are, yet without sin. Let us therefore come boldly unto the throne of grace, that we may obtain mercy, and find grace to help in time of need.
James 1:5-6 If any of you lack wisdom, let him ask of God, that giveth to all men liberally, and upbraideth not; and it shall be given him. But let him ask in faith, nothing wavering. For he that wavereth is like a wave of the sea driven with the wind and tossed.