He could not help feeling that his first foray into Occlumency had weakened his mind’s resistance rather than strengthening it, and he wondered, with a feeling of great trepidation, what had happened to make Lord Voldemort the happiest he had been in fourteen years.
There are no more uses of "foray" in the book.
Show samples from other sources
The scientist has a successful foray into local politics.
He speaks for a long time, and his words weave a life before my eyes, the life of a dark-haired, curious-eyed child who snuck out from lessons so he could go adventuring, who waited eagerly at the edge of camp for the men of the Tribe to return from their merchant forays.