And when He saw a fig tree in the way, He came to it, and found nothing thereon, but leaves only, and said unto it, Let no fruit grow on thee henceforward for ever. And presently the fig tree withered away. And when the disciples saw it, they marvelled, saying, How soon is the fig tree withered away!”- Matthew 21:19

The blighted fig tree was a singularly apt simile of the Jewish state. The nation had promised great things to God. When all the other nations were like trees without leaves, making no profession of allegiance to the true God, the Jewish nation was covered with the leafage of abundant religious profession. Scribes, pharisees, priests and elders of the people were all sticklers for the letter of the law, and boaster of being worshippers of the one God, and strict observers of all His laws. Their constant cry was, “The temple of the Lord, The temple of the Lord, The temple of the Lord, are these.” “We have Abraham as our father” was frequently on their lips. They were a fig tree in full leaf. But there was no fruit upon them; for the people were neither holy, nor just, nor true, nor faithful towards God, nor loving to their neighbor. The Jewish church was a mass of glittering profession, unsupported by spiritual life. Our Lord had looked into the temple and had found the house of prayer to be a den of thieves. He condemned the Jewish church to remain a lifeless, fruitless thing; and it was so. The synagogue remained open; but its teaching became a dead form. Israel had no influence upon the age.

What a lesson is this to nations! Nations may make a profession, a loud profession, of religion, and yet may fail to exhibit that righteousness which exalteth a nation. Nations may be adorned with all the leafage of civilization, and art, and progress, and religion; but if there be no inner life of godliness, and no fruit unto righteousness, they will stand for a while, and then wither away. ~ C.H. Spurgeon

https://www.blueletterbible.org/Comm/spurgeon_charles/sermons/2107.cfm