What is "nasi'"

Nasīʾ (; lit. "postponement") was an aspect of the calendar of pre-Islamic Arabia, mentioned in the Quran in the context of the "four forbidden months". In pre-Islamic Arabia, the decision of "postponement" had been administered by the Banu Kinanah, by a man known as the al-Qalammas (pl. qalāmisa). Different interpretations of its meaning have been proposed.