Psalm 95:2 King James Version (KJV)

2 Let us come before his presence with thanksgiving, and make a joyful noise unto him with psalms.

Matthew 17:20-21 King James Version (KJV)

20 And Jesus said unto them, Because of your unbelief: for verily I say unto you, If ye have faith as a grain of mustard seed, ye shall say unto this mountain, Remove hence to yonder place; and it shall remove; and nothing shall be impossible unto you.

21 Howbeit this kind goeth not out but by prayer and fasting.