Al Quran : Verily, in the remembrance of Allah do hearts find rest .

Bismillahirrahmanirrahim 

And the men and the women who remember Allah much with their hearts and tongues Allah has prepared for them forgiveness and a great reward 
Al Quran : Surah Al Ahzab (33) : Verse 35

Verily, in the remembrance of Allah do hearts find rest .
Al Quran , Surah Ar-Rad (13) , Verse 28

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Hadith: Abdullaah ibn Umar (may Allaah be pleased with him) that the Prophet (peace and blessings of Allaah be upon him) said: “There are no days that are greater before Allah or in which good deeds are more beloved to Him, than these ten days, so recite a great deal of Tahleel (La ilaha illAllah) Takbeer ( Allahu AKbar) , aur tamheed (Alhamdulilah) during them.”
Masnad Ahmed, Vol 7 Hadith: 224
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سبحان الله الحمد لله الله اكبر
Allahu Akbar... .Alhamdulillah.....Subhanallah

سُبْحَانَ اللّهِ وَ بِحَمْدِهِ ، سُبْحَانَ اللّهِ الْعَظِيمِ
SubhanAllahi wa biHamdihi, Subhan-Allahil-azeem

لا اِلهَ اِلَّا اللّهُ وَحْدَهُ لا شَرِيكَ لَهُ ، لَهُ الْمُلْكُ وَ لَهُ الْحَمْدُ وَ هُوَ عَلَى كُلِّ شَيْءٍ قَدِيرٌ
La illaha ilAllahu, waHdahu la shareeka lahu, lahul Mulku, wa lahul Hamdu, wa Huwa ala kulli shaiy'in Qadeer ....

رَضِيتُ بِاللَّهِ رَبَّاً وَبِالْإِسْلَامِ دِينَاً وَبِمُحَمَّدٍ نَبِيَّاً
Radaitu billahi Rabba , wa bilislami deena , wa bi muhammadin (Sallallahu Alaihi Wasallam) Nabiyya
(Main Allah ko apna RAB hone aur Islam ko apna Deen hone aur Muhammad Sallallahu Alaihi Wasallam ko apna Nabee hone par razi hu)

اللَّهُـمّ صَــــــلٌ علَےَ مُحمَّــــــــدْ و علَےَ آل مُحمَّــــــــدْ
Allahumma salli ala muhammad wa ala aali muhammed