“Whoever recites the following Du’a seven times in the morning and in the evening, Allah Almighty will suffice for him and free him of all worries of both this world and the hereafter, and make his major and important tasks easy.”(Sunan Abi Dawood: 5081)
According to another report, one will not have any restlessness, troubles and nor will he die due to drowning during that morning and evening.
اللهُ لَااِلٰهَ اِلَّا هُوَ عَلَيْهِ تَوَكَّلتُ
رَبُّ الْعَرْشِ الْعَظِيمِ
Allah is sufficient for me. There is none worthy of worship but Him. I have placed my trust in Him, He is the Lord of the Majestic Throne.