The Fourth Treatise On the elucidation of the noun patterns that are not complete, and it too is divided into thirteen principles: The First Principle. On the elucidation of nouns missing the first letter nun:

The Second Principle. On the elucidation of nouns with a weak first letter aleph or yod:

The Third Principle. On the elucidation of nouns with a weak middle letter that appear with an added letter:

The Fourth Principle. On the elucidation of nouns with a weak middle letter that appear without an added letter:

The Fifth Principle. On the elucidation of nouns with a weak final letter lamed–aleph:

The Sixth Principle. On the elucidation of nouns with a weak final letter lamed–he:

The Seventh Principle. On the elucidation of nouns with a weak final letter lamed–he that appear with an added mem at the beginning and a tav at the end:

The Eighth Principle. On the elucidation of nouns with a weak final letter lamed–he that appear without an added letter at the beginning, and which take the feminine he:

The Ninth Principle. On the elucidation of nouns with a weak final letter lamed–he that appear with a root he at the end:

The Tenth Principle. On the elucidation of nouns with a weak final letter lamed–he that are of two letters:

The Eleventh Principle. On the elucidation of nouns from the category of doubled roots that appear with a missing letter:

The Twelfth Principle. On the elucidation of nouns from the category of doubled roots that appear with an added mem or tav at the beginning:

The Thirteenth Principle. On the elucidation of nouns of four or five letters:

The signs are completed. And in the name of Him Who dwells in eternity: I shall begin the book, which gives beautiful words. Completed, completed, completed.