Was listening to C-SPAN, they said his written statement for the record of the hearing was very offensive. "I would like to state, under oath," and then two words they wouldn't repeat. Doing a Google search of "SBF Fuck You" shows he's already told regulators and his lawyers to go F themselves, I'm guessing he said the same to the US Congress.
He said "I fucked up" which would get C-SPAN in trouble with the FCC.
It is a very defiant and entitled sounding statement though.