Surah 37. As-Saffat, Ayah 117

I.e., "the Torah, wherein there was guidance and light ... unto those who followed the Jewish faith" ( 5:44 ).

Mustabin has a slightly different force from Mubin. I have translated the former by "which helps to make things clear", and the latter by "which makes things clear",-apt descriptions as applied to the Taurat and the Qur-an.