يَفْقَهُوا۟ قَوْلِى
That they may understand my speech.
যাতে তারা আমার কথা বুঝতে পারে।
The best of you are those who learn the Quran and teach it.(Sahih al-Bukhari 5027)
Verse 28 of Surah Taa-Haa. This Surah is Meccan and has 135 ayahs; this ayah is in Juz 16.
Sahih International · মুহিউদ্দীন খান — Sources