Generally, three methods were used to preserved úódõth:

The first method was memorization. The Arabs were renowned for their memories, particularly their ability to memorize long poems along with the biographies of their authors. They could recollect long lists of the names of poets’ forefathers and their lineages. Not only that, the Arabs also memorized the lineage of their horses, even the horse’s gaits. Thus, thousands of names were at the tip of their tongues, and through the blessings of the Ahadith Allah (SWTH) added to their proficiency in the art of memorization.

This simple method of preserving úadīth cannot be ignored, especially when eminent personalities like Imam Bukhari have recorded incidents such as that of Marwan, which illustrate the extraordinary memory of the Arabs. Marwan was the first governor of Damascus and also the first emir of the Umayyad Dynasty. His secretary, Abñ al-Za‘za, narrates that once Marwón called the eminent Sahabi, Abñ Huraira , to his court. It is said that the reason behind this rare invitation of a Sahabi to Marwan’s court was that Marwan doubted the large number of ahadith Abñ Huraira had memorized and frequently narrated. Before Abñ Huraira entered, Marwan instructed his secretary, Abñ al-Za‘za, to hide behind a curtain with a pen and paper in his hand. He said, “I am going to ask him to narrate some aúódõth; while he narrates, I want you to pen all the aúódõth down.” When Abñ Huraira entered, Marwón asked him about some aúódõth. As Abñ Huraira began narrating, Abñ al-Za‘za wrote them down. Abñ al-Za‘za says, “Abñ Huraira continued narrating for a long time and I saw that I had written a large collection of aúódõth on my papers.” It seems from Abñ al-Za‘za’s words “úadõthun kathõrun” that he had indeed recorded a large collection of aúódõth on his paper. Meanwhile, Abñ Huraira had no idea he was being tested. After this, Abñ Huraira left. Marwón preserved the scrolls of the secretly recorded Hadith and waited for the following year. A year later, Marwan again invited Abñ Huraira to honor him with his presence. Once again, Marwan told Abñ al-Za‘za to hide behind the curtain with the papers on which he had written the aúódõth the previous year. He said, “I am going to repeat the same questions I asked last year. Check and see if it coincides with the aúódõth of the previous year.” It was an extemporaneous test for Abñ Huraira. Abñ al-Za‘za says, “So Marwón kept the year old aúódõth in his hands. After one year, he again called upon Abñ Huraira as I sat quietly behind the curtain. As he put the questions, I looked into my papers. He did not add to or subtract from even one word of a Hadīth.”8

Though it is not possible to ascertain the exact number of Ahadith noted, it is clear that it was a significant number. A similar incident occurred with Ibn Shihób al-Zuhrõ during the same time period. Hishóm ibn ‘Abd al-Malik called Ibn Shihab to his court. In this incident, it is clearly mentioned that Ibn Shihab narrated exactly four hundred Ahadith.

It is also mentioned in the books of history that Hisham tested Ibn Zuhra’s memory as Marwan had Abñ Huraira’s. The story goes like this:

One day, Ibn Shihób came to the court for something. Hishóm personally requested Ibn Shihób to write some aúódõth for his son, the prince. Ibn Shihób accepted; a scribe was called in and the dictation began. Dhahabõ writes, “Ibn Shihab dictated four hundred aúódõth to the prince.”.

Then Ibn Shihób left. When Ibn Shihób returned a month later, Hishóm feigned remorse by saying to Ibn Shihób, “I am saddened to tell you that the parchments on which the aúódõth were written have disappeared and they are nowhere to be found.” “What is this to cry about?” asked Ibn Shihób. “Call the scribe and I will dictate them again.” This was precisely the objective of Hishóm. He quickly ordered the scribe to his court. Ibn Shihab dictated the same aúódõth over again. The first collection of aúódõth had not really disappeared, it was only a ploy to test Ibn Shihób’s memory of Ahadõth. When Ibn Shihób left the court, Hisham compared the older copy with the new one and saw that no change had been made to the original copy of aúódõth.9

Had it not been for the úuffóþ [memorizers] of Qura’n today, the claim “not one addition had been made to the original copy of Ahadith” would seem like a tale from a children’s storybook. Today one can test a Hafiz [memorizer] from the Qura’n, which is bigger than a collection of four hundred aúódõth. Having him read a chapter of the Qur’an and then asking him to recite it from memory will prove that word for word, there will be no difference between the first recitation and the second. One is thus forced to admit that neither any addition nor any subtraction was made to these Ahadith.