You should recite this prayer before going to sleep

 

The Prophet (peace and blessings of Allaah be upon him) said many dhikrs, tasbeehs and supplications to get rid of sins.  There is a prayer in these prayers that if you recite the prayer while lying in bed, the amount of foam in the sea will be forgiven.  It has been narrated in the hadith-

The Prophet (peace and blessings of Allaah be upon him) said, ‘Whoever recites this prayer while lying in bed, his sins will be forgiven;  Although it is equal to the foam of the sea.  The prayer is- لا إله إلا الله وحده لا شريك له, له الملك وله الحمد وهو على كل شيء قدير, لا حول و لا قوة الا بالله سبحان الله والحمد لله و لا اله الا الله والله اكبر say: 'La ilaha illallahu La sarika lahu oyahadahu;  Lahul Mulku wa Lahul Hamdu wa Hua Ala Kulli Shayin Qadir.  La hawla wa la kuwata illa billahi.  Subhanallahi wal hamdu lillahi wa la ilaha illallahu wallahu akbar. '

Meaning: ‘There is no true god but Allah.  He has no partners.  To Him belongs the kingdom and to Him belongs all praise and He has power over all things.  There is no way and ability except Allah.  Glory be to God, and to Him belongs all praise.  There is no true god but Allah, and Allah is the Greatest. '(Ibn Hibban, Ibn Abi Shaybah)

 There are also multiple prayers before going to sleep.  The prayers that are recited such as sins are forgiven, prayers are accepted, peaceful restful sleep.  Many more dignified virtues are gained.

Therefore, a believing Muslim should recite the mentioned prayer while lying on the bed while sleeping.  With the blessing of this prayer, Allah will forgive the sins equal to the foam of the sea.

 May Allaah grant the Muslim Ummah the Tawfeeq to attain the declared virtue and dignity of the hadeeth by performing this regular night ritual properly.  Give a sinless life.  Amen.