Abu Al -Hassan Saeed bin Masada Al -Akhfash, may God have mercy on him, said: This is the interpretation of the science of rhymes, what it is, and how long it is. Know that the rhyme is the last word at home. The rhyme is feminine, and the letter is male, and if they may feminize the masculine. But this has heard from the Arabs. The names are not taken by analogy. Do you not see that a man, a wall, and a like that is not taken by analogy, but rather we look at what the Arabs called and follow. By that they said to an Arab, eloquent, we sang a poem on the signifier and other letters, and if they do not know the letters. "