Reference : Hisn al-Muslim 99

يَجْمَعُ كَفَّيْهِ ثُمَّ يَنْفُثُ فِيهِمَا فَيَقْرَأُ فِيهِمَا: 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}
ثُمَّ يَمْسَحُ بِهِمَا مَا اسْتَطَاعَ مِنْ جَسَدِهِ يَبْدَأُ بِهِمَا عَلَى رَأْسِهِ وَوَجْهِهِ وَمَا أَقبَلَ مِنْ جَسَدِهِ (يفعلُ ذلك ثلاثَ مرَّاتٍ)
Bismillāhir-Raḥmānir-Raḥīm.
Qul huwallāhu aḥad.
Allāhuṣ-ṣamad.
Lam yalid wa lam yūlad.
Wa lam yakun lahu kufuwan aḥad.
Reference: Al-Ikhlas 112:1-4.

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.
Reference: Al-Falaq 113:1-5.

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.
Reference: An-Nas 114:1-6

Hold the palms together, blow (with a little spittle) into them, and recite: 

"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."

(Then pass your hands over as much of your body as you can reach, beginning with the head and the face, then the entire front of your body. Do this three times.)

Reference:
Al-Bukhari, cf. Al-Asqalani, Fathul-Bari 9/62, and Muslim 4/ 1723.

Chapter: Before sleeping