"The Tathagata, the World-Honored One, taught his disciples how to sit and said to them, "If you want to manifest samadhi and enter it, you should ga… - Dōgen

"The Tathagata, the World-Honored One, taught his disciples how to sit and said to them, "If you want to manifest samadhi and enter it, you should gather together all distracted thought and scattered mind within this posture. Practice in this way and you will manifest and intimately enter the king of samadhis."

Thus we clearly know that sitting in the meditation posture is itself the king of samadhis. It is itself entering realization."