ISA 8:1

1 Moreover Hashem said unto me, Take thee a gillayon gadol [(great slab)], and write on it with cheret enosh concerning Maher Shalal Chash Baz [(The Spoil Speeds, the Booty Hastens [i.e., the coming Assyrian defeat of Syria and Israel is imminent and the life of this son of Isaiah is a prophetic time line. See verse 4 below])].