The phrase "betray to" is not grammatically correct or usable in written English.
To use it correctly, you should use the phrase "betray to someone". For example, "He was betrayed to the police by his friend."
"If we can convince one of them not to betray to the police a neighbor who practices Falun Gong, then we have achieved something".
The arrest might have been delayed by the hope that Mr. Motassadeq, by his movements or contacts, would betray to investigators fresh information.
And those news-mongers, as they called them, did not only take the boldness to weigh the public but most intrinsic actions of the state, which some courtier or other did betray to this society.
This provided an opportunity for a high-ranking Lazic noble, called Terdetes, who had quarrelled with Gubazes, to betray to the Persians an important fort in the land of the Apsili, a tribe under Lazic suzerainty.
Sir Jonathan Sacks, the former chief Rabbi of the Commonwealth of Nations, claims that, in "a society in which adolescents are precociously adult, and adults are permanently adolescent", Harry Potter has "reclaimed the kingdom of childhood, proving that you don't have to betray to enchant".
The slang phrase meaning "to inform, betray" used to be to drop a dime.
(I felt a little betrayed to discover she was beautiful).
And Carmela, betrayed to the breaking point, is Clytemnestra.
I wanted the main person I betrayed to be myself.
He wanted to feel superior without betraying to others his sense of superiority.
When the plot was betrayed to the Spanish, several members were arrested.
