Bible verses about "doubting" | KJV

¹⁶ He that believeth and is baptized shall be saved; but he that believeth not shall be damned.

¹⁰ If thou faint in the day of adversity, thy strength is small.

²⁸ Hast thou not known? hast thou not heard, that the everlasting God, the LORD, the Creator of the ends of the earth, fainteth not, neither is weary? there is no searching of his understanding.

³¹ Therefore take no thought, saying, What shall we eat? or, What shall we drink? or, Wherewithal shall we be clothed? ³² (For after all these things do the Gentiles seek:) for your heavenly Father knoweth that ye have need of all these things. ³³ But seek ye first the kingdom of God, and his righteousness; and all these things shall be added unto you. ³⁴ Take therefore no thought for the morrow: for the morrow shall take thought for the things of itself. Sufficient unto the day is the evil thereof.

²⁶ Likewise the Spirit also helpeth our infirmities: for we know not what we should pray for as we ought: but the Spirit itself maketh intercession for us with groanings which cannot be uttered. ²⁷ And he that searcheth the hearts knoweth what is the mind of the Spirit, because he maketh intercession for the saints according to the will of God.

⁶ 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.