Acts 5:8

8. Peter answered The term answered presupposes previous interchange of words, omitted for brevity.

Tell me It is asked, Why did not Peter kindly forewarn her against committing the fatal crime and so prevent her fate? But, alas! her crime was already committed. To speak the lie out only made it vocally manifest to men. The full-formed, long-retained lie in the human heart, the definite will and determination, were all complete and visible to the divine Spirit. Exposure and penalty were all that remained.

For so much Either Peter named the sum which Luke vaguely implies in these words, or he pointed to the money lying in exact amount before them both. Sapphira’s echoing affirmation, For so much, indicates both the latter to be the fact and the fixed precision of her falsehood.