It was narrated that Thabit bin Ad-Dahhak said:
The Messenger of Allah (ﷺ) said: 'Whoever takes an oath to follow a religion other than Islam, telling a deliberate lie, he will be as he said.'" (ID)
English reference (ID): Vol. 3, Book 11, Hadith 2098 (ID)
Arabic reference (ID): Book 11, Hadith 2176 (ID)