John Gill Commentary Acts 6:11

"Then they suborned men, who said, We have heard him speak blasphemous words against Moses, and [against] God." — Acts 6:11 (ASV)

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) .