FBI Deputy Director Paul Abbate visibly stunned Republican Missouri Sen. Josh Hawley on Tuesday with his estimate of how many Americans the Bureau has “unintentionally” spied on.

Abbate testified before the Senate Judiciary Committee, where Hawley grilled him as to why the FBI would not commit to publicly releasing the 1023 form relating to President Joe Biden and his alleged foreign business dealings. Abbate said doing so would endanger the life of the document’s source, prompting Hawley to argue the source’s name could be redacted.

Abbate then said Hawley should take the source’s safety “seriously.”