Matthew 13:31-32 - The Parable Of The Mustard Seed
31 Jesus told them another parable, saying, "The kingdom of heaven is similar to a seed from the mustard tree which a man took and planted in his field. 32 This seed is indeed [one of] the smallest of all seeds, but when it is [fully] grown, it is larger than [other] plants, and [even] becomes a tree, so that the birds of the sky come and roost on its branches."
30 And He continued to speak, "What shall I compare the kingdom of God to? Or, what parable will [best] illustrate it? 31 It is similar to a seed from the mustard tree which, when planted in the ground, 32 even though it is the least [significant] of all seeds on earth, becomes larger than all other plants. It develops huge branches so that the birds of the sky can roost in their shade."
33 And He spoke "the word" to them [i.e., the crowds] with as many such parables as they were able to receive. 34 And He did not speak to them [i.e., concerning the kingdom] without using a parable, but He explained everything to His own disciples privately.