John Gill Commentary Amos 7:16

"Now therefore hear thou the word of Jehovah: Thou sayest, Prophesy not against Israel, and drop not [thy word] against the house of Isaac;" — Amos 7:16 (ASV)

Now therefore hear you the word of the Lord
Which I have from him concerning you, and which he has pronounced upon you and your family: you say, prophesy not against Israel ;
when God has bid me prophesy: and drop not [your word] against the house of Isaac ;
say nothing against it, though in ever so soft and gentle a manner: it designs the same thing as before, only in different words; and is a prohibition of the prophet to prophesy against the ten tribes that descended from Isaac, in the line of Jacob. So the Targum paraphrases it, ``thou shalt not teach against the house of Isaac;'' or deliver out any prophecy or doctrine that is against them, or threatens them with any calamity. Jarchi says the phrase is expressive of prophecy; see (Deuteronomy 32:2) (Ezekiel 21:2) .