There are two types of   (the letter  indicating a female gender) in the Qur’an: 

1.     That which is written with what is called , in other words written as:

2.     That which is written with what is called , or written as the letter .

These two different ways of writing this letter are of the specifics of the ‘Uthmani writing.  It is important that the reciter knows these well, so that he stops according to the way it is written; this means the reader must stop with a  when the word is written with and stop with a  when the word is written with .  There are two subdivisions of this section, one being those words that are agreed to be singular and written with , the second being those words that are written with , but there is a difference of opinion on whether it is singular or plural.

The female  which is agreed to be singular and is written with a

This occurs in the revelation in 13 words in 41 places.  They are all words in singular form and are adjuncted by a clear noun after it  recites these with a when stopping.  The 13 words that are sometimes written with are:
.

These will now be covered individually. We will start with two of these words and cover their occurrences this lesson, and continue next lesson with the other words. 

There are seven places where this word was written in the Qur’an with , all other places in the Qur’an are written with .

Imam Al-Jazaree documented these places in his poem famously known as al-jazariyyah, when he wrote:

The word "Kaf" refers to surah Maryam.

This word was written in the Holy Qur’an with  in 11 places, the rest are written with a .

Imam Al-Jazaree continued in the same part of the tajweed poem and documented the occurrence of the word written as in the following lines: