وَنَوَافِلُ النَّهَارِ إِنْ شَاءَ صَلَّى رَكْعَتَيْنِ بِتَسْلِيمَةٍ وَاحِدَةٍ، وَإِنْ شَاءَ أَرْبَعًا، وَيُكْرَهُ الزِّيَادَةُ عَلَى ذَلِكَ.
Translation: As for daytime voluntary prayer, one may perform two or four rakahs with one salam; adding more than that is disliked.
The ruling concerns the number of rakahs within one unit ending in a single salam, not the total number of voluntary rakahs in the day. Separate sets of two or four remain possible.
Combining more than four daytime rakahs under one opening and closing salam is disliked in the Hanafi treatment.