How do I make up missed prayers (qada)?
If you slept through or forgot a prayer, pray it as soon as you remember — that is its only expiation. Pray missed prayers in order where you can, and keep up the current prayers on time.
Evidence
إِنَّنِيٓ أَنَا ٱللَّهُ لَآ إِلَٰهَ إِلَّآ أَنَا۠ فَٱعۡبُدۡنِي وَأَقِمِ ٱلصَّلَوٰةَ لِذِكۡرِيٓ
Indeed, I am Allāh. There is no deity except Me, so worship Me and establish prayer for My remembrance.
فَإِذَا قَضَيۡتُمُ ٱلصَّلَوٰةَ فَٱذۡكُرُواْ ٱللَّهَ قِيَٰمٗا وَقُعُودٗا وَعَلَىٰ جُنُوبِكُمۡۚ فَإِذَا ٱطۡمَأۡنَنتُمۡ فَأَقِيمُواْ ٱلصَّلَوٰةَۚ إِنَّ ٱلصَّلَوٰةَ كَانَتۡ عَلَى ٱلۡمُؤۡمِنِينَ كِتَٰبٗا مَّوۡقُوتٗا
And when you have completed the prayer, remember Allāh standing, sitting, or [lying] on your sides. But when you become secure, re-establish [regular] prayer. Indeed, prayer has been decreed upon the believers a decree of specified times.
مَنْ نَسِيَ صَلاَةً فَلْيُصَلِّ إِذَا ذَكَرَهَا، لاَ كَفَّارَةَ لَهَا إِلاَّ ذَلِكَ
Narrated Anas:The Prophet (ﷺ) said, "If anyone forgets a prayer he should pray that prayer when he remembers it. There is no expiation except to pray the same." Then he recited: "Establish prayer for My (i.e. Allah's) remembrance." (20.14).
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