Matt.8.32  And he said to them, "Go." So they came out and went into the swine; and behold, the whole herd rushed down the steep bank into the sea, and perished in the waters.
Mark.5.13  So he gave them leave. And the unclean spirits came out, and entered the swine; and the herd, numbering about two thousand, rushed down the steep bank into the sea, and were drowned in the sea.
Luke.8.33  Then the demons came out of the man and entered the swine, and the herd rushed down the steep bank into the lake and were drowned.

Hyper-concordance v1.1, by Sean Boisen. Scripture verses taken from the Revised Standard Version, copyright 1952, 1971.