Which section in these excerpts from Jane Austen's Pride and Prejudice shows that Mr. Bennet is keeping information about Mr. Bingley to himself to heighten the curiosity of Mrs. Bennet and his daughters?

Not all that Mrs. Bennet, however, with the assistance of her five daughters, could ask on the subject, was sufficient to draw from her husband any satisfactory description of Mr. Bingley. They attacked him in various ways-with barefaced questions, ingenious suppositions, and distant surmises; but he eluded the skill of them all), and they were at last obliged to accept the second-hand intelligence of their neighbour, Lady Lucas.

Explanation:

In that specific extract it plainly expresses that regardless of the amount Mrs. Bennett and her little girls question Mr. Bennett, he won't answer any of their inquiries with respect to Mr. Bingley.