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