I heard a sheikh recite surah At-Tahreem and at the last aayah of the surah, he read: wa kitaabihi.

Question
Assalaamu alaikum. 
My question is that once I heard a sheikh recite surah At-Tahreem and at the last aayah of the surah, he read: wa kitaabihi, as it is plural written in the Qur'an wa kutubihi. Can you please explain this?
JazakAllahu khiran.  

Answer
The different qira'aat vary on the reading of this word, some read this word in the sinular form and some in the plural form.  The writing of the Qur'an accomodates both ways of reading.  The alif is the "dagger" alif, and not part of the original writing of the word, and the vowels were not part of the 'Uthmani writing.  You are looking at a copy of the Qur'an for the recitation of Hafs 'an 'Aasim, so the enhancements to the writing (vowels) are for this way of reading.  The copies of the Qur'an for the ways of recitation that read it in the singular form have the proper vowel enhancments and most likely the "dagger" or smal alif) placed above the ta'. 

Wa iyyaakum