وَيَسْتَعِيذُ بِاللَّهِ مِنَ الشَّيْطَانِ الرَّجِيمِ، وَيَقْرَأُ: «بِسْمِ اللَّهِ الرَّحْمَنِ الرَّحِيمِ»، وَيُسِرُّ بِهِمَا.
Meaning: He seeks Allah’s refuge from Satan the rejected, then recites “In the name of Allah, the Most Merciful, the Especially Merciful,” and recites both quietly.
The dual pronoun bihima refers to both the invocation for refuge and the basmalah, so the quiet recitation concerns both.