وباعتبار وجوب السبب جاز التعجيل في باب الأداء
Advance payment can be considered in light of the existence of the legal cause.
In the source's treatment of zakat, ownership of nisab and the lapse of a year have distinct functions. Where the relevant original cause exists, advance payment before the year ends may be valid under the applicable conditions.
Giving money labeled “zakat” before owning any qualifying nisab is not legally the same as advancing zakat after the relevant ownership threshold has been met. The first lacks the foundational cause; the second raises a permitted timing question.