What is the degree of authenticity and merit of the hadith mentioning the remembrance, "Glorified are You, O Allah, and with Your praise, I bear witness that there is no god but You, I seek Your forgiveness and repent to You," after ablution?

The Hadith is authentic, paused at Abu Sa'id, and has the ruling of being مرفوع (traced back to the Prophet); because such a statement cannot be said based on personal opinion. Therefore, this remembrance is legislated after ablution: "Glorified be You, O Allah, and with Your praise, I bear witness that there is no god but You, I seek Your forgiveness and repent to You."