Tafsir of Al-An'am 6:67

لكل نبٳ مستقر

For every news there is a reality..., According to Ibn Abbas and others, meaning, for every news, there is a reality, in that, this news will occur, perhaps after a while. Allah said in other Ayat,

ولتعلمن نبٲه بعد حين

And you shall certainly know the truth of it after a while. (38:88) and,

لكل أجل كتاب

(For) each and every matter there is a decree (from Allah). (13:38) This, indeed, is a warning and a promise that will surely occur,

وسوف تعلمون

and you will come to know. Allah's statement,