Dua Between Prostrations by MyIslaam
 
Ibn Abas Allah be pleased with him narrates that the Prophet of Allah, Allah send peace and blessings upon him, would say between the two prostrations,

Oh Allah, forgive me, have mercy on me, save me (from all bad), guide and provide for me (everything beneficial)

عَنِ ابْنِ عَبَّاسٍ أَنَّ النَّبِىَّ -صلى الله عليه وسلم- كَانَ يَقُولُ بَيْنَ السَّجْدَتَيْنِ

اللَّهُمَّ اغْفِرْ لِى وَارْحَمْنِى وَعَافِنِى وَاهْدِنِى وَارْزُقْنِى

(رواه أبو داود، باب الدعاء بين السجدتين)