A.T. Robertson Commentary Matthew 9:27

"And as Jesus passed by from thence, two blind men followed him, crying out, and saying, Have mercy on us, thou son of David." — Matthew 9:27 (ASV)

As Jesus passed by (παραγοντ Ιησου). Associative instrumental case with ηκολουθησαν. It was the supreme opportunity of these two blind men. Note two demoniacs in Mt 8:28 and two blind men in Mt 20:30. See the same word παραγων used of Jesus in 9:9.