The Messenger of Islam (PBUH) was fully aware of the greatness of Allah. It is not easy to understand the greatness of Allah and it requires a complete and comprehensive intellect, it requires a heart that its capacity must be as extensive as the whole universe so that it can fully realize and fathom out the greatness of Almighty Allah.no one in the whole universe, neither among the angels or Jinns nor among the human beings, has ever been more aware to Allah Almighty than the holy prophet (PBUH). No wise living creature has ever had the worship of the Messenger of Islam (PBUH). of course, it is worth noting that worshiping is not about the quantity and it does not mean that the Messenger of Allah (PBUH) had been fasting during the whole year, and was saying prayers during every second of his life, but the weight of his knowledge toward Allah Almighty in worshiping and his level of sincerity in worshiping was unique and no one had been like him. if he said two units morning prayers, that was heavier than the weight of the prayers of all angels and Jinns.
source : erfan.ir