قُلْ
...
Say:
"Say, O Muhammad, to those who deny you, oppose you and continue in their disbelief and obstinance."
...
كُلٌّ مُّتَرَبِّصٌ
...
Each one is waiting,
among you and us;
...
فَتَرَبَّصُوا
...
so wait you too;
This is a command to await (anticipate).
...
فَسَتَعْلَمُونَ مَنْ أَصْحَابُ الصِّرَاطِ السَّوِيِّ
...
and you shall know who are they that are on As-Sirat As-Sawi.
This means the straight road.
...
وَمَنِ اهْتَدَى
And who are they that have let themselves be guided.
meaning guidance to the truth and the path of right guidance.
This is similar to Allah's statement,
وَسَوْفَ يَعْلَمُونَ حِينَ يَرَوْنَ الْعَذَابَ مَنْ أَضَلُّ سَبِيلً
And they will know, when they see the torment, who it is that is most astray from the path! (25:42)
And Allah said,
سَيَعْلَمُونَ غَداً مَّنِ الْكَذَّابُ الاٌّشِرُ
Tomorrow they will come to know who is liar, the insolent one! (54:26)
This is the end of the Tafsir of Surah Ta Ha, and all praise and gratitude is due to Allah.