Riyad as-Salihin, Book 12, Hadith 1286 (In-Book) ⓘ

Ibn Mas'ud (May Allah be pleased with him) reported: I asked the Messenger of Allah: "Which action is dearest to Allah?" He replied, "Performing As-Salat (the prayer) at its earliest fixed time." I asked, "What is next (in goodness)?" He said, "Kindness towards parents." I asked, "What is next (in goodness)?" He said, "To participate in Jihad in the Cause of Allah."[Al-Bukhari and Muslim].

وعن ابن مسعود، رضي الله عنه قال‏:‏ قلت يا رسول الله أي العمل أحب إلى الله تعالى‏؟‏ قال‏:‏ ‏"‏الصلاة على وقتها‏"‏ قلت‏:‏ ثم أي‏؟‏ قال‏:‏ ‏"‏بر الوالدين‏"‏ قلت ثم أي‏:‏ قال‏:‏ ‏"‏الجهاد في سبيل الله‏"‏ ‏(‏‏(‏متفق عليه‏)‏‏)‏