كتاب النكاح
Read the English translation first, with the original Arabic directly underneath.
Narrated `Umar bin Al-Khattab:
The Prophet (ﷺ) said, "The rewards (of deeds) are according to the intention, and everybody will get the reward for what he has intended. So whoever emigrated for Allah's and His Messenger's sake, his emigration was for Allah and His Messenger; and whoever emigrated for worldly benefits, or to marry a woman, then his emigration was for the thing for what he emigrated for." (1)
الْعَمَلُ بِالنِّيَّةِ، وَإِنَّمَا لاِمْرِئٍ مَا نَوَى، فَمَنْ كَانَتْ هِجْرَتُهُ إِلَى اللَّهِ وَرَسُولِهِ فَهِجْرَتُهُ إِلَى اللَّهِ وَرَسُولِهِ صلى الله عليه وسلم وَمَنْ كَانَتْ هِجْرَتُهُ إِلَى دُنْيَا يُصِيبُهَا أَوِ امْرَأَةٍ يَنْكِحُهَا، فَهِجْرَتُهُ إِلَى مَا هَاجَرَ إِلَيْهِ