Anas bin Malik reported,

The Prophet ﷺ said, "Whoever forgets a prayer should pray it as soon as he remembers it. There is no expiation for it except that. 'And establish prayer for My remembrance' [Taha 20:14]."

Azami 2512

Sahih

عن أنس بن مالك

عن النبي ﷺ قال: من نسى صلاة فليصل إذا ذكرها، لا كفارة لها إلا ذلك، {وأقم الصلوة لذكرى} [سورة طه: ١٤].

الأعظمي 2512صحيح
Contents
Reference
Commentary
Ayat
Collection
Jami al-Kamil
Book
Prayer
Chapter
Forbidden times for prayer
Section
Whoever forgets a prayer should pray it when he remembers it, even if the time is disliked
Numbering
Jami al-Kamil 2512 (2nd edition)
Azami 2512