What are you talking about?
4 seconds sound clip from the Mr. Topaze (1961) movie soundboard.
You can hear this line at 01:01:21 in the Blu-ray version of the movie.
Quote context
[...]
- It's your commission on the deal and a month's salary in advance.
- Madam, I feel that this story of a company is a disguised way of... Well, of offering me charity.
- My dear Topaze, my dear Albert, you are completely mistaken.
- I give you my word of honour that you can truly render me great services. Can't he?
- Really on your word of honour?
[...]