20 When the disciples saw it, they marveled, saying, “How did the fig tree immediately wither away?”
Matthew 21:20 Cross References - WEB
Isaiah 40:6-8
6 The voice of one saying, “Cry!” One said, “What shall I cry?” “All flesh is like grass, and all its glory is like the flower of the field.
7 The grass withers, the flower fades, because Yahweh’s breath blows on it. Surely the people are like grass.
8 The grass withers, the flower fades; but the word of our God stands forever.”