A.T. Robertson Commentary Luke 7:30

"But the Pharisees and the lawyers rejected for themselves the counsel of God, being not baptized of him." — Luke 7:30 (ASV)

Rejected for themselves (ηθετησαν εις εαυτους). The first aorist active of αθετεω first seen in LXX and Polybius. Occurs in the papyri. These legalistic interpreters of the law refused to admit the need of confession of sin on their part and so set aside the baptism of John. They annulled God's purposes of grace so far as they applied to them.

Being not baptized by him (μη βαπτισθεντες υπ' αυτου). First aorist passive participle. Μη is the usual negative of the participle in the Koine.