“¶ Another parable put he foorth vnto them, saying, The kingdome of heauen is like to a graine of mustard seed, which a man tooke, and sowed in his field.”
1611 King James Version (KJV)
13:31 He proposed to them another parable - The former parables relate chiefly to unfruitful hearers; these that follow, to those who bear good fruit. The kingdom of heaven - Both the Gospel dispensation, and the inward kingdom. #Mark 4:30|; Luke 13:18.
Mt 13:31 Like to a grain of mustard seed. Compare Lu 13:18-21. The Jews grew mustard in their gardens. Its round seed was previously spoken of as the smallest thing, as it was the smallest seed planted.