Is "Glory be to Him who does not go astray nor forget; glory be to Him who neither sleeps nor errs" to be said during the prostration of forgetfulness?

There is no evidence for the legitimacy of allocating a specific supplication for the prostration of forgetfulness (sujood as-sahw). Rather, one says in it "Subhana Rabbiyal-A'la" (Glory be to my Lord, the Most High), just like any other prostration in prayer, because of the saying of Hudhayfah (may Allah be pleased with him): "The Prophet (peace be upon him) used to say in his bowing (ruku'): 'Subhana Rabbiyal-A'zeem (Glory be to my Lord, the Most Magnificent),' and in his prostration (sujood): 'Subhana Rabbiyal-A'la (Glory be to my Lord, the Most High).'"