Learn and Read Six Kalimas in Islam. 1- First Kalma (Tayyaba), Second Kalima (Shahadat), 3- Third Kalima (Tamjeed) Arabic mp3 with English Translation.
" I seek forgiveness from ALLAH, who is my Creator and Cheriser, from every sin I committed knowingly or unknowingly, secretly or openly. I also seek His forgiveness for all sins which I am aware of or am not aware of. Certainly You (O ALLAH!), are the Knower of the hidden and the Concealer of mistakes and the Forgiver of sins. And there is no power and no strength except with ALLAH, the Most High, the Most Great."
"O ALLAH! Certainly I seek protection with You from, that I associate partner with You anything and I know it. And I seek forgiveness from You for that I do not know it. I repented from it and I made myself free from disbelief and polytheism and the falsehood and the back-biting and the innovation and the tell-tales and the bad deeds and the blame and the disobedience, all of them. And I submit and I say (there is) none worthy of worship except ALLAH, Muhammad is the Messenger of ALLAH."