He also said Abedin “appears to have had a regular practice of forwarding emails to him for him I think to print out for her.”
Only a small number of forwarded emails were deemed to contain classified information, one source said.
One law enforcement official familiar with the investigation told ABC News that the vast majority of Abedin's emails were backed up to her husband's computer, rather than forwarded.
None of the forwarded emails were marked classified, but a handful number contained information that was later deemed classified, these sources said.
The FBI found 650,000 emails on Weiner's computer, most of which were unrelated to the Clinton email investigation. Using electronic searches the FBI was eventually able to narrow down 6,000 emails that it had to review. Comey announced two days before the election that the FBI had reviewed those emails and that it decision not to press charges stood.
Weiner was accused of exchanging sexually explicit text messages with a minor, but he has so far not been charged with any crime.
The FBI has not yet responded to ABC News' request for comment.
ABC News has also reached out to the Judiciary Committee for comment on the director's testimony.
This is a developing story. Please check back for updates.