佛說觀佛三昧海經 7.41

7.41

The Buddha said to his father the king: “These and such like are called the buddhānusmṛti-samādhi of future ages, also called discerning the Buddha’s body, also called knowing the Buddha's physical marks, also called the samādhi of mindfulness of the Buddha, and also called the Buddhas' light shielding and protecting sentient beings.”