لِ،  بِ،  مِنْ،  لَا،  مَا،  أَنْ،  إنْ   etc. harf sometimes come as extra. These do not have grammatical significance but sometimes come to emphasize. 

Your Lord is not unjust to the slaves.

وَمَا رَبُّكَ بِظَلَّامٍ لِّلْعَبِيدِ

Then

بِ

I destroyed many populations.

وَكَم مِّن قَرْيَةٍ أَهْلَكْنَاهَا

So

مِنْ

By the grace of Allah you have become soft hearted for them

فَبِمَا رَحْمَةٍ مِّنَ اللَّهِ لِنتَ لَهُمْ

that

مَا

 

কোর্স বিষয়বস্তু

11 চ্যাপ্টার • 112 পাঠ

Chapter-13
35 lessons

Chapter-19
1 lesson

Chapter-20
1 lesson