This quote (Reeves, p408) from The Sutra of Contemplation of the Dharma Practice of Universal Sage Bodhisattva follows a reference to the Lotus Sutra and Chapter 19, The Merits of the Teacher of the Dharma. This is part of the instructions given to the contemplating practitioner by “hundreds of thousands of myriads of millions of innumerable buddhas everywhere”:

“Now you should practice diligently and never be lazy. These Great Vehicle sutras are the buddhas’ storehouse of the Dharma; they are the eyes of the buddhas in all directions and in the past, present, and future; and they are the seeds that give birth to tathagatas in the past, present, and future. One who embraces these sutras embraces the body of the Buddha and does the work of the Buddha. Such a person should understand that he or she has been sent by the buddhas and are covered by robes of buddhas, the world-honored ones. This is a child of the true Dharma of the buddhas, the tathagatas. Practice the Great Vehicle and do not cut off the seeds of Dharma!

The source of the instruction underscores the universality of the message, which is full of concepts also found in the Lotus Sutra.