Then they suborned men, which said, We have heard him speak blasphemous words against Moses, and against God.

Then they suborned men, saying, We have heard him speaking blasphemous words against Moses and God.

then they suborned men, saying, 'We have heard him speaking evil sayings in regard to Moses and God.'

Then they privately put forward men who declared, "We have heard him speak blasphemous things against Moses and against God."

Then they got men to say, He has said evil against Moses and against God, in our hearing.

Then they suborned men who were to claim that they had heard him speaking words of blasphemy against Moses and against God.

Then they induced some men to assert that they had heard Stephen saying blasphemous things against Moses, and against God;

Then they suborned men - To suborn in law means to procure a person to take such a false oath as constitutes perjury (Webster). It has substantially this sense here. It means that they induced them to declare what was false, or to bring a false accusation against him. This was done, not by declaring a palpable and open falsehood, but by "perverting" his doctrines, and by stating their own "inferences" as what he had actually maintained - the common way in which people oppose doctrines from which they differ. The Syriac reads this place, "Then they sent certain men, and instructed them that they should say, etc." This was repeating an artifice which they had before practiced so successfully in relation to the Lord Jesus Christ. See Matthew 26:60-61.
We have heard - When they alleged that they had heard this is not said. Probably, however, they referred to some of his discourses with the people when he performed miracles and wonders among them, Acts 6:8.
Blasphemous words - See the notes on Matthew 9:3. Moses was regarded with profound reverence. His laws they held to be unchangeable. Any intimation, therefore, that there was a greater Lawgiver than he, or that his institutions were mere shadows and types, and were no longer binding, would be regarded as blasphemy, even though it should be spoken with the highest professed respect for Moses. That the Mosaic institutions were to be changed, and give place to another and a better dispensation, all the Christian teachers would affirm; but this was not said with a design to blaspheme or revile Moses. "In the view of the Jews," to say that was to speak blasphemy; and hence, instead of reporting what he actually "did" say, they accused him of "saying" what "they" regarded as blasphemy. If reports are made of what people say, their very "words" should be reported; and we should not report our inferences or impressions as what they said.
And against God - God was justly regarded by the Jews as the giver of theft law and the author of their institutions. But the Jews, either willfully or involuntarily, not knowing that they were a shadow of good things to come, and were therefore to pass away, regarded all intimations of such a change as blasphemy against God. God had a right to change or abolish those ceremonial observances, and it was "not" blasphemy in Stephen to declare it.

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, Matthew 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.

Then they suborned men,.... Hired false witnesses, which seems to have been commonly done by the Jews; so they did in the case of Christ:
which said, we have heard him speak blasphemous words against Moses, and against God; that is, against the law of Moses, and so against God, who gave the law to Moses, as appears from Acts 6:13 the blasphemous words seem to be, with respect to the ceremonial law, and the abrogation of it, which Stephen might insist upon, and they charged with blasphemy; see Acts 6:14.

blasphemous words against Moses--doubtless referring to the impending disappearance of the whole Mosaic system.
and against God--This must refer to the supreme dignity and authority which he claimed for Christ, as the head of that new economy which was so speedily to supersede the old (compare Acts 7:56, Acts 7:59-60).

They suborned men. Induced men to give perverted testimony. They determined to silence Stephen.
Heard him speak blasphemous words. This was the charge against Christ. It is likely that, like Paul, he plainly preached that the Old Covenant had given place to the New, and that God's people were no longer under Moses, but under Christ. This was perverted into blaspheming Moses.