زَعَمتَyou claimed أنَّthat كتاباًa letter
زَعَمتَ أنَّ كتاباً
بَعَثتهyou sent it مَعْwith رَسولِa messenger
بَعَثته مَعْ رَسولِ
You claimed that a letter—
You claimed you sent a book
one you sent with a messenger—
With a messenger,
مَلأتَهyou filled it مِنكَfrom you طيباًfragrance
مَلأتَه مِنكَ طيباً
فَضاعَthen it was lost قبلَbefore الوصولِarrival
فَضاعَ قبلَ الوصولِ
you had filled with your fragrance,
Filled with your perfume,
but it was lost before arrival.
But it was lost before reaching me.