KJV : And it shall come to pass, when many <07227> evils <07451> and troubles <06869> are befallen <04672> (8799) them, that this song <07892> shall testify <06030> (8804) against <06440> them as a witness <05707>; for it shall not be forgotten <07911> (8735) out of the mouths <06310> of their seed <02233>: for I know <03045> (8804) their imagination <03336> which they go about <06213> (8802), even now <03117>, before I have brought <0935> (8686) them into the land <0776> which I sware <07650> (8738). {against: Heb. before} {go...: Heb. do}
NASB : "Then it shall come about, when many evils and troubles have come upon them, that this song will testify before them as a witness (for it shall not be forgotten from the lips of their descendants); for I know their intent which they are developing today, before I have brought them into the land which I swore."
NASB# : "Then it shall come<1961> about, when<3588> many<7227> evils<7463> and troubles<6869> have come<4672> upon them, that this<2088> song<7892> will testify<6030> before<6440> them as a witness<5707> (for it shall not be forgotten<7911> from the lips<6310> of their descendants<2233>); for I know<3045> their intent<3336> which<834> they are developing<6213> today<3117>, before<2962> I have brought<935> them into the land<776> which<834> I swore<7650>."