Riyad us Saliheen: Hadith 1056

The Messenger of Allah (ﷺ) said, "The person who will receive the highest reward for Salat (prayer) is the one who comes to perform it in the mosque from the farthest distance. And he who waits for Salat to perform it with the Imam (in congregation) will have a greater reward than the one who observes it alone and then goes to sleep."

[Al-Bukhari and Muslim].