Hadith #4428 (Mishkat al-Masabih)
Book: Author's Introduction

“Deeds are to be judged only by intentions, and a man will have only what he intended. When one’s emigration is to God and His Messenger, his emigration is to God and His Messenger; but when his emigration is to a worldly end at which he aims, or to a woman whom he marries, his emigration is to that to which he emigrated.”
(Bukhari and Muslim.)

Source: https://parallelquran.com/hadith/mishkat-al-masabih-4428/