Mark 4:31

Tis like a grain of mustard seed, which when it may be sown upon the earth, is the smallest of all seeds which are upon the earth,

Matthew 13:31-33

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;

Luke 13:18-19

Then He said, To what is the kingdom of God like? and to what shall I liken it?

Acts 2:41

Then indeed having received his word they were baptized, and on that day about three thousand souls were added unto them;

Acts 4:4

And many of those hearing the word believed, and the number of men was about five thousand.

Acts 5:14

but believers were the more added to the Lord, a multitude both of men and women,

Acts 19:20

Thus the word of the Lord increased and accumulated strength according to His power.

Revelation 11:15

And the seventh angel sounded; and there were great voices in the heaven, saying, The kingdom of this world has become the kingdom of our Lord, and his Christ; and he will reign until the ages of the ages.

Revelation 20:1-6

And I saw an angel coming down out of the heaven, having the key of the bottomless pit, and a great chain on his hand.

Treasury of Scripture Knowledge

Summary

It is like a grain of mustard seed, which, when it is sown in the earth, is less than all the seeds that be in the earth:

Bible References

Like

Matthew 13:31
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;
Luke 13:18
Then He said, To what is the kingdom of God like? and to what shall I liken it?

Is less than

Acts 2:41
Then indeed having received his word they were baptized, and on that day about three thousand souls were added unto them;
Acts 4:4
And many of those hearing the word believed, and the number of men was about five thousand.
Acts 5:14
but believers were the more added to the Lord, a multitude both of men and women,
Acts 19:20
Thus the word of the Lord increased and accumulated strength according to His power.
Revelation 11:15
And the seventh angel sounded; and there were great voices in the heaven, saying, The kingdom of this world has become the kingdom of our Lord, and his Christ; and he will reign until the ages of the ages.
Revelation 20:1
And I saw an angel coming down out of the heaven, having the key of the bottomless pit, and a great chain on his hand.