What is the grading of Abu Hurayrah's hadith in Al-Nasa’i: "Whoever glorifies (Allah) one hundred times after the dawn prayer, and declares His oneness one hundred times, his sins will be forgiven, even if they were like the foam of the sea," and what is its degree of authenticity, and is Al-Albani’s ijtihad (independent reasoning) in authenticating it sound?

The aforementioned Hadith is weak due to Abu Al-Zubayr's sole narration of it, and he was a mudallis (one who conceals defects in a Hadith's chain) who narrated with the 'an'anah (using the word "on the authority of" without explicitly stating direct hearing). What is authentically preserved in this Hadith is the glorification (Subhanallah), praise (Alhamdulillah), and magnification (Allahu Akbar) thirty-three times after each prayer.