Salaam
When you say: La ilaha il-Allah - wahdahu laa shareeka lahu-lahul-mulku wa lahul-hamdu - wa huwa ala kulli shay'in qadeer. [There is none worthy of worship except Allah alone. He has no partners. To Him belongs the Dominion, to Him belongs all praise and He is capable over all things] a hundred times a day.
The evidence is what has been reported in the Saheeh of al Bukhaari and Muslim from Abu Hurayrah (R.A.) that Allah's Messenger Sall-Allahu alayhi wa sallam mentioned the above words and then said: "He will receive the reward of setting free ten slaves, a hundred good deeds will be written for him and a hundred bad deeds will be erased from him. It will be a sanctuary from Shaytaan for him on that day until he reaches the evening. No one will come with something better except one who increases beyond that".
