Matthew 12:15, Matthew 12:16 are found essentially in Mark 3:7, Mark 3:12; the remainder of this section, the application of prophecy. here only. But when Jesus knew it; and Jesus perceiving it (Revised Version).
Whether by his own unaided powers, or by intelligence brought him, is not stated. He withdrew himself (cf. Matthew 4:12, he departed, note) from thence. We see from the next clause that this withdrawal was not into any very retired spot, but rather away front the town in which he had been.
His motives may have been partly to carry on his work more quietly elsewhere (fulfilling his own injunction, Matthew 10:23), and partly to avoid stirring up the excitement of partisans like those who a little later wished to seize him by force and make him king (John 6:15, where observe "withdrew").
And great multitudes followed him, and he healed them all. Almost verbally in Matthew 19:2.