The words (witness) to say before accepting islam
اَشْہَدُ اَنْ لَا اِلٰہَ اِلَّا اللّٰہُ وَ حْدَہٗ لَا شَرِیْکَ لَہٗ وَ اَشْھَدُ اَنَّ مُحَمَّدًا عَبْدُہٗ وَ رَسُوْلُہٗ
transileration
"ash hadhu an layilaha illallaahu vah dhahu la shareeka lahu va ashhadhu anna muhammadhan abduhu rasu luhu"
I bear witness that there is none worthy of worship except Allah.
He is One and has no partner.
And I bear witness that Muhammad is His Servant and Messenger.