(45) باب هِجْرَةُ النَّبِيِّ صلى الله عليه وسلم وَأَصْحَابِهِ إِلَى الْمَدِينَةِ
Narrated `Umar:
I heard the Prophet (ﷺ) saying, "The reward of deeds depends on the intentions, so whoever emigrated for the worldly benefits or to marry a woman, his emigration was for that for which he emigrated, but whoever emigrated for the Sake of Allah and His Apostle, his emigration is for Allah and His Apostle."
Reference: Sahih al-Bukhari 3898
In-book reference: Book 63, Hadith 124
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 5, Book 58, Hadith 238