It was narrated that 'Abdullah bin Mas'ud said:
"I asked the Messenger of Allah (ﷺ) which action is most beloved to Allah? He said: 'Establishing prayer on time, honoring one's parents and Jihad in the cause of Allah.'" (DE)
English reference (DE): Vol. 1, Book 6, Hadith 612 (DE)
Arabic reference (DE): Book 6, Hadith 618 (DE)