12. master and . . . scholar--literally, "him that watcheth and him that answereth." So "wakeneth" is used of the teacher or "master" (Isa 50:4); masters are watchful in guarding their scholars. The reference is to the priests, who ought to have taught the people piety, but who led them into evil. "Him that answereth" is the scholar who has to answer the questions of his teacher (Lu 2:47) [GROTIUS]. The Arabs have a proverb, "None calling and none answering," that is, there being not one alive. So GESENIUS explains it of the Levite watches in the temple (Ps 134:1), one watchman calling and another answering. But the scholar is rather the people, the pupils of the priests "in doing this," namely, forming unions with foreign wives. "Out of the tabernacles of Jacob" proves it is not the priests alone. God will spare neither priests nor people who act so.
      him that offereth--His offerings will not avail to shield him from the penalty of his sin in repudiating his Jewish wife and taking a foreign one.

JFB.