Hawzah News Agency – The merciful prophet of Islam, peace be upon him and his household says:

لا تَزالُ لا إله إلّا اللَّهُ تَنْفَعُ مَن قالَها حتّى‏ يُسْتَخَفَّ بها، والاسْتِخْفافُ بِحَقِّها أنْ يَظْهَرَ العملُ بالمَعاصي فلا يُنْكِروهُ ولا يُغَيِّروهُ.

'[The statement] 'There is no god but Allah' will benefit whoever recites it until he depreciates it. And depreciating its right is when sins are openly committed, and they neither prohibit them, nor do they change them.'

Source: Kanz al-Ummal, no. 223