And a believing man of Fir'awn 's household, hiding his belief, said: would ye slay a man because he saith: my Lord is God, and hath come upto you with evidences from your Lord? If he is a liar, then upon him will be his lie, and if he is a truth-teller, then there will befall you some of that wherewith he threateneth you; verily God guideth not one who is an extravagant and a liar.