Reference : Hisn al-Muslim 70

بِسْمِ اللَّهِ الرَّحْمَنِ الرَّحِيمِ
{قُلْ هُوَ اللَّهُ أَحَدٌ*
اللَّهُ الصَّمَدُ*
لَمْ يَلِدْ وَلَمْ يُولَدْ*
وَلَمْ يَكُن لَّهُ كُفُواً أَحَدٌ}
 بِسْمِ اللَّهِ الرَّحْمَنِ الرَّحِيمِ
{قُلْ أَعُوذُ بِرَبِّ الْفَلَقِ*
مِن شَرِّ مَا خَلَقَ*
وَمِن شَرِّ غَاسِقٍ إِذَا وَقَبَ*
وَمِن شَرِّ النَّفَّاثَاتِ فِي الْعُقَدِ*
وَمِن شَرِّ حَاسِدٍ إِذَا حَسَدَ}
بِسْمِ اللَّهِ الرَّحْمَنِ الرَّحِيمِ
{قُلْ أَعُوذُ بِرَبِّ النَّاسِ*
مَلِكِ النَّاسِ*
إِلَهِ النَّاسِ*
مِن شَرِّ الْوَسْوَاسِ الْخَنَّاسِ*
الَّذِي يُوَسْوِسُ فِي صُدُورِ النَّاسِ*
مِنَ الْجِنَّةِ وَالنَّاسِ}
بَعْدَ كُلِّ صَلاَةٍ.
Bismillāhir-Raḥmānir-Raḥīm. 
Qul huwallāhu aḥad. 
Allāhuṣ-ṣamad. 
Lam yalid wa lam yūlad. 
Wa lam yakun lahu kufuwan aḥad.

Bismillāhir-Raḥmānir-Raḥīm. 
Qul a`ūdhu birabbil-falaq. 
Min sharri mā khalaq. 
Wa min sharri ghāsiqin idhā waqab. 
Wa min sharrin-naffāthāti fil-`uqad. 
Wa min sharri ḥāsidin idhā ḥasad.

Bismillāhir-Raḥmānir-Raḥīm. 
Qul a`ūdhu birabbin-nās. 
Malikin-nās. 'Ilāhin-nās. 
Min sharri ‘l-waswāsil-khannās. 
Alladhī yuwaswisu fī ṣudūrin-nās. 
Minal-jinnati wannās.


(Surahs 112 al-Ikhlas, 113 al-Falaq, and 114 an-Nas)
These Surahs should be recited in Arabic after each prayer. After the Maghrib and Fajr prayers, they should be recited three times each.

With the Name of Allah, the Most Gracious, the Most Merciful.
Say: He is Allah (the) One.
The Self-Sufficient Master, Whom all creatures need,
He begets not nor was He begotten,
and there is none equal to Him.

With the Name of Allah, the Most Gracious, the Most Merciful.
Say: I seek refuge with (Allah) the Lord of the daybreak,
from the evil of what He has created,
and from the evil of the darkening (night) as it comes with its darkness,
and from the evil of those who practice witchcraft when they blow in the knots,
and from the evil of the envier when he envies.

With the Name of Allah, the Most Gracious, the Most Merciful.
Say: I seek refuge with (Allah) the Lord of mankind,
the King of mankind,
the God of mankind,
from the evil of the whisperer who withdraws,
who whispers in the breasts of mankind,
of jinns and men. 

Reference:
Abu Dawud 2/86, An-Nasa'i 3/68. See also Al-Albani, Sahih At-Tirmidhi 2/8.

Chapter: After salam