This hadith has been narrated by Qatada, but here no mention has been made of" There is no explation for it except this."
Sahih Muslim Book 5, Hadith 400
← Previous Hadith He who forgets the prayer should say it when he remembers it, there is no explation for it, except this. Qatada said: (Allah says)" And observe prayer for remembrance of Me"

Sahih Muslim Book 5, Hadith 399 Next Hadith → He who forgets the prayer, or he slept (and it was omitted), its expiation is (only) that he should observe it when he remembers it.

Sahih Muslim Book 5, Hadith 401