Reference : Hisn al-Muslim 93

لا إلهَ إلاّ اللّهُ وحْـدَهُ لا شَـريكَ لهُ، 
لهُ المُـلْكُ ولهُ الحَمْـد، 
وهُوَ على كُلّ شَيءٍ قَدير . 
(مائة مرة إذا أصبح)
Lā ilāha illallāhu waḥdahu lā sharīka lah, 
lahu ‘l-mulku walahu ‘l-ḥamd, 
wa huwa `alā kulli shay'in qadīr.

None has the right to be worshipped but Allah alone, Who has no partner. 
His is the dominion and His is the praise and He is Able to do all things. 
(Recite 100 times in Arabic upon rising in the morning).

Reference:
Whoever recites this one hundred times a day will have the reward of 
freeing ten slaves. One hundred Hasanaat (rewards) will be written for him 
and one hundred misdeeds will be washed away. He will be shielded from 
Satan until the evening. No one will be able to present anything better 
than this except for someone who has recited more than this. Al-Bukhari 
4/95, Muslim 4/2071.

Chapter: In the morning and evening