I said that, I told you that
This expression is the abbreviated form of (느)ㄴ다고 하니까 and is used to indicate the speaker's response or view with respect to his or her own belief, to a statement heard from someone else, or to some known fact, reason, or basis for some belief.
The response indicated by this expression can include actions, verbal responses, and emotional responses.
★ 형용사의 의문형은 '-으냐니까'와 '냐니까' 둘 다 가능하고 동사의 의문형은 '느냐니까'와 '냐니까' 둘 다 모두 가능합니다.
This expression requires different subjects in the preceding and following clauses.
Reminds the listener about something already said, or about a prediction that came true.
This is an abbreviation of 다[고 하니까]는 and (이)라[고 하니까]는.