Luke 13:19

It is like a grain of mustard seed, which a man, taking, cast into his own garden; and it grew, and became a tree; and the birds of the heaven lodged in its branches."

Matthew 17:20

And He saith to them, "Because of your little faith. For verily I say to you, if ye have faith as a grain of mustard seed, ye shall say to this mountain, 'Remove hence yonder,' and it will be removed, and nothing shall be impossible to you."

Matthew 13:31-32

Another parable He set before them, saying, "The Kingdom of Heaven is like a grain of mustard seed, which a man, having taken, sowed in his field:

Mark 4:31-32

It is like to a grain of mustard, which when it is sown upon the earth, though it is less than all the seeds that are upon the earth,

Luke 17:6

And the Lord said, "If ye have faith as a grain of mustard seed, ye would say to this sycamine tree, 'Be rooted up, and be planted in the sea,' and it would obey you.

Acts 2:41

Those, therefore, who gladly received his word, were immersed; and there were added to them on that day about three thousand souls;

Acts 4:4

And many of those who heard the word believed; and the number of the men became about five thousand.

Acts 15:14-18

Simeon declared how God first visited the gentiles, to take out of them a people for His name.

Acts 21:20

And they, hearing it, were glorifying God, and said to him, "You observe, brother, how many thousands there are among the Jews, of those who have believed; and they are all zealous for the law.

Romans 15:19

in the power of signs and wonders, in the power of the Holy Spirit; so that from Jerusalem and around as far as Illyricum, I have fully dispensed the Gospel of Christ;

Revelation 11:15

And the seventh angel sounded; and there followed great voices in Heaven, saying, "The kingdom of the world became our Lord's and His Christ's; and He will reign forever and ever."

Treasury of Scripture Knowledge

Summary

It is like a grain of mustard seed, which a man took, and cast into his garden; and it grew, and waxed a great tree; and the fowls of the air lodged in the branches of it.

Bible References

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Matthew 13:31
Another parable He set before them, saying, "The Kingdom of Heaven is like a grain of mustard seed, which a man, having taken, sowed in his field:
Matthew 17:20
And He saith to them, "Because of your little faith. For verily I say to you, if ye have faith as a grain of mustard seed, ye shall say to this mountain, 'Remove hence yonder,' and it will be removed, and nothing shall be impossible to you."
Mark 4:31
It is like to a grain of mustard, which when it is sown upon the earth, though it is less than all the seeds that are upon the earth,

And it

Acts 2:41
Those, therefore, who gladly received his word, were immersed; and there were added to them on that day about three thousand souls;
Acts 4:4
And many of those who heard the word believed; and the number of the men became about five thousand.
Acts 15:14
Simeon declared how God first visited the gentiles, to take out of them a people for His name.
Acts 21:20
And they, hearing it, were glorifying God, and said to him, "You observe, brother, how many thousands there are among the Jews, of those who have believed; and they are all zealous for the law.
Revelation 11:15
And the seventh angel sounded; and there followed great voices in Heaven, saying, "The kingdom of the world became our Lord's and His Christ's; and He will reign forever and ever."