FIRSTBORN : Levites taken instead of firstborn of the families of Israel (Numbers 3:12,40-45;8:16-18)
GOAT : Regulations of Mosaic law required that a baby goat should not be killed for food before it was eight days old (Leviticus 22:27)
ISAIAH : Prophesies in the days of Uzziah, Jotham, Ahaz, and Hezekiah, kings of Judah (Isaiah 1:1;6:1;7:1,3;14:27;20:1;36:1;38:1;:)