The above two hadith have been narrated likewise through another chain of transmitters.
The Book of Dreams - Sahih Muslim 2267b
In the name of Allah, the Most Gracious, the Most Merciful. All praise is due to Allah, Lord of the worlds, and may peace and blessings be upon His final Messenger Muhammad.
This narration from Sahih Muslim confirms the authenticity of the preceding traditions concerning dreams through an alternative chain of reliable transmitters (isnad). Such multiple chains of transmission strengthen the authenticity of the prophetic tradition and demonstrate the meticulous preservation of the Sunnah by the scholars of hadith.
The science of hadith verification requires examining each chain of narrators for their reliability, memory, and connection to one another. When a tradition is reported through different chains that meet the conditions of authenticity, it attains a higher degree of certainty. This principle, known as tawaatur in meaning, affirms the soundness of the dream-related teachings previously mentioned.
Thus, this supplementary narration serves to reinforce the divine wisdom regarding dreams as expounded in the earlier hadith, confirming that true dreams constitute one of the forty-six parts of prophethood, and that righteous dreams may contain glad tidings from Allah or warnings that benefit the believer in their spiritual journey.