Adam Clarke on Matthew 20:34

So Jesus had compassion on them - Σπλαγχνιαθεις, He was moved with tender pity. The tender pity of Christ met the earnest cry of the blind men, and their immediate cure was the result.

They followed him - As a proof of the miracle that was wrought, and of the gratitude which they felt to their benefactor. For other particulars of this miraculous cure, see the notes on Mar 10:46, etc.

Reader, whosoever thou art, act in behalf of thy soul as these blind men did in behalf of their sight, and thy salvation is sure. Apply to the Son of David; lose not a moment; he is passing by, and thou art passing into eternity, and probably wilt never have a more favorable opportunity than the present. The Lord increase thy earnestness and faith!