¶ When they heard these things, they were cut to the heart, and they gnashed on him with [their] teeth.
Berean Study Bible (BSB) - Acts 7:54 >On hearing this, the members of the Sanhedrin were enraged, and they gnashed their teeth at him.
Textus Receptus (TR) - Acts 7:54 >Ἀκούοντες δὲ ταῦτα, διεπρίοντο ταῖς καρδίαις αὐτῶν, καὶ ἔβρυχον τοὺς ὀδόντας ἐπ᾿ αὐτόν.