(Commentary on Hadith 1662) From these ahadith, the nisab (minimum threshold) for cows and oxen is known, and that after the completion of one lunar year, for thirty cows, one-year-old calf (male or female) is due; and for forty cows or oxen, a two-year-old musinnah (i.e., an animal with two permanent teeth) is due; and thereafter, for every forty, a two-year-old musinnah is due.