Lk 1:31-33, Rom 1:3, Isa 53:2, Jn 1:47-51, Mt 13:31-32
In the Old Testament, God said that the people of Israel would rest at the top of the cedar tree, namely, by appointing one person from the family of David. (Eze 17:22-23)
Eze 17:22 Thus saith the Lord God; I will also take of the highest branch of the high cedar, and will set it; I will crop off from the top of his young twigs a tender one, and will plant it upon an high mountain and eminent: 23 In the mountain of the height of Israel will I plant it: and it shall bring forth boughs, and bear fruit, and be a goodly cedar: and under it shall dwell all fowl of every wing; in the shadow of the branches thereof shall they dwell.
Jesus is the Christ who inherited David's kingship forever as a descendant of David. (Luke 1:31-33, Romans 1:3)
Luke 1:31 And, behold, thou shalt conceive in thy womb, and bring forth a son, and shalt call his name Jesus. 32 He shall be great, and shall be called the Son of the Highest: and the Lord God shall give unto him the throne of his father David: 33 And he shall reign over the house of Jacob for ever; and of his kingdom there shall be no end.
Romans 1:3 Concerning his Son Jesus Christ our Lord, which was made of the seed of David according to the flesh;
Jesus knew that Nathanael was thinking of the coming Christ under the fig tree. (John 1:47-51)
John 1:47 Jesus saw Nathanael coming to him, and saith of him, Behold an Israelite indeed, in whom is no guile! 48 Nathanael saith unto him, Whence knowest thou me? Jesus answered and said unto him, Before that Philip called thee, when thou wast under the fig tree, I saw thee. 49 Nathanael answered and saith unto him, Rabbi, thou art the Son of God; thou art the King of Israel. 50 Jesus answered and said unto him, Because I said unto thee, I saw thee under the fig tree, believest thou? thou shalt see greater things than these. 51 And he saith unto him, Verily, verily, I say unto you, Hereafter ye shall see heaven open, and the angels of God ascending and descending upon the Son of man.
Jesus was like a tender shoot and as unsightly as a mustard seed, but he is the Christ who gives peace to all. (Isa 53:2, Mt 13:31-32)
Isa 53:2 For he shall grow up before him as a tender plant, and as a root out of a dry ground: he hath no form nor comeliness; and when we shall see him, there is no beauty that we should desire him.
Mt 13:31 Another parable put he forth unto them, saying, The kingdom of heaven is like to a grain of mustard seed, which a man took, and sowed in his field: 32 Which indeed is the least of all seeds: but when it is grown, it is the greatest among herbs, and becometh a tree, so that the birds of the air come and lodge in the branches thereof.