Hadith same text are each counted as individual ahadith. If, say, ten companions record a text reporting a single incident in the life of Muhammad, hadith scholars can count this as ten hadiths. So Musnad Ahmad, for example, has over 30,000 hadiths—but this count includes texts that are repeated in order to record slight variations within the text or within the chains of narrations. Identifying the narrators of the various texts, comparing their narrations of the same texts to identify both the soundest reporting of a text and the reporters who are most sound in their reporting occupied experts of hadith
Hadith of Golden Chain Hadith Qudsi, i.e., the word of God, but differs from Quran. The Gabriel transmitted hadith from God to prophet. Al-Silsilah al-Dhahab is Mutawatir. Shia and sunni scholars have narrated the hadith by Different expressions with authenticity. This hadith is Musalsal meaning that it's a word of God and is conveyed from Prophet of Islam through Ahl al-Bayt to Ali al-Ridha. In other word, narrators of the hadith are Prophet and Ahl al-Bayt. According to shia view they are infallible and immune from error in practical matters, in inviting people to the religion and in perceiving the realm of cognition. because