Adam Clarke on Acts 6:11

Then they suborned men - Ὑπεβαλον. They made underhand work; got associated to themselves profligate persons, who for money would swear any thing.

Blasphemous words against Moses, and against God - This was the most deadly charge they could bring against him. We have already seen, Mat 9:4, that blasphemy, when against God, signifies speaking impiously of his nature, attributes, or works; and, when against men, it signifies speaking injuriously of their character, blasting their reputation, etc. These false witnesses came to prove that he had blasphemed Moses by representing him as an impostor, or the like; and God, by either denying his being, his providence, the justice of his government, etc.