an invocation of God as confirmation of the truth of a statement
上帝作证，老天作证（用于确认事实）
God be my witness, sir, I didn't!.老天作证，先生，我没干！。
God be my witness, sir, I didn't!.
老天作证，先生，我没干！。
(archaic)appeal or refer to someone or something for confirmation or evidence of something
(古)请…作证；传…作证