Sa'd Ibn Abee Waqqaas (radhi-yAllaahu 'anhu) narrated that a man came to the Messenger of Allaah (sal-Allaahu 'alayhe wa sallam) and said to him: Teach me something which I should say? He (sal-Allaahu 'alayhe wa sallam) said: Say:
لَا إِلٰهَ إِلَّا اللّٰهُ وَحْدَهُ لَا شَرِيْكَ لَهُ، اَللّٰهُ أَكْبَرُ كَبِيْراً، وَالْحَمْدُ لِلّٰهِ كَثِيْراً، سُبْحَانَ اللّٰهِ رَبِّ الْعَالَمِيْنَ، لَا حَوْلَ وَلَا قُوَّةَ إِلَّا بِاللّٰهِ الْعَزِيْزِ الْحَكِيْمِ
None has the right to be worshipped except Allaah, alone without any partner. Allaah is most great and much praise is for Allaah. How perfect Allaah is, Lord of the worlds. There is no might nor power except with Allaah, The Exalted in might, The Wise.
Laa 'ilaaha 'illallaahu wahdahu laa shareeka lahu, Allaahu 'Akbaru kabeeran, walhamdu lillaahi katheeran, Subhaanallaahi Rabbil-'aalameen, laa hawla wa laa quwwata 'illaa biilaahil-'Azeezil-Hakeem.
...the man then said: These are for my Lord, and what is for me? He (sal-Allaahu 'alayhe wa sallam) replied: Say:
اَللّٰهُمَّ اغْفِرْ لِيْ، وَارْحَمْنِيْ، وَاهْدِنِيْ، وَعَافِنِيْ وَارْزُقْنِيْ
O Allaah, forgive me, have mercy upon me, guide me and grant me sustenance.
Allaahummaghfir lee, warhamnee, wahdinee, wa 'aafinee warzuqnee.