They perform them according to what the Messenger of Allah (may Allah bless him and grant him peace) established for each of those prayers. "And spend out of what We have provided for them", meaning: the obligatory Zakat, also in accordance with its established Sunnah.
يتمونها على مَا سنّ رَسُول اللَّهِ ﷺ فِي كُلِّ صَلَاة مِنْهَا ﴿وَمِمَّا رَزَقْنَاهُمْ يُنْفقُونَ﴾ يَعْنِي: الزَّكَاة الْمَفْرُوضَة على سنتها أَيْضا.
