Zakāt is obligatory upon every free, adult, sane Muslim who possesses a niṣāb with exclusive, complete proprietary control of person and disposal, upon whom a full lunar year (ḥawl) has elapsed—as an immediate obligation, according to [one] position.
Whoever dies owing zakāt, ṣadaqat al-fiṭr, fasting, a vow, or an expiation—it falls away unless he has bequeathed it; then [the bequest] is executed out of one third.
[Payment] does not suffice except with an intention accompanying discharge, or [intention for] segregating [the zakāt amount], unless he gives charity with the entire niṣāb.
The niṣāb for silver ware (waraq) is silver: two hundred dirhams; ten of them weigh seven mithqāls, most of them silver—with five therein; thereafter on every forty dirhams [one pays], and shortfalls are waived.
The niṣāb for gold: twenty mithqāls, mostly gold—with half a mithqāl therein; then on every four mithqāls: two carats (qīrāṭāni)—and shortfalls are waived.
Gold, silver and trade goods aggregate with one another by value; and what is short of forty [dirhams] aggregates with what is short of four mithqāls likewise.
Whoever owes a due animal he does not possess may pay a superior head—recovering surplus with the collector’s leave—or pay inferior stock together with surplus outright.
The obligatory [animal taken] is middle grade from niṣāb-level stock.
Ruling
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ومطلقAnd any unspecifiedContextual glossالمستفادnew acquisitionContextual glossيضمّaggregatesContextual glossفيwithinContextual glossالحول،[the] lunar year,Contextual glossإلاexceptContextual glossأنَّthatContextual glossالربحprofitContextual glossوالولدand offspringContextual glossيضمّaggregateContextual glossإلىtoContextual glossأصلهits principalContextual glossلاnotContextual glossغير،to others;Contextual glossوغيرهماand other than the two of themContextual glossيضمّaggregateContextual glossإلىtoContextual glossأقرب[the] nearest genusContextual glossجنسهitsContextual glossحولاً.lunar year.Contextual gloss
Unspecified acquisitions aggregate within the ḥawl; profit and offspring aggregate to principal only—other receipts attach to nearest kind for a fresh lunar cycle.