It is narrated from Sayyiduna Sahl bin Sa'd (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "That I attend the Fajr prayer, then sit remembering Allah until the sun rises, is dearer to me than charging on swift horses in the path of Allah until the sun rises."
Hadith Referenceالمعجم الكبير للطبراني / باب السين / 5740