And He submitted another parable to them, saying; The kingdom of the heavens is like unto a grain of mustard seed, which, a man having taken, sowed in his field;

and Jesus says to them, On account of your unbelief. For truly I say unto you, If you have faith as a grain of mustard seed, you will say to this mountain, Remove hence to yonder place; and it shall remove; and nothing shall be impossible to you.