The Quraysh of Allah's Messenger

This is a reference to this fundraiser that took place in Makkah for the battle of Beitih. They all came together and they donated the biggest monies that they ever had. That they ever donated for an army. So Allah is saying fasayun firconah hah. Then it will be a source of regret and then they will lose in the end. Those who have disbelieved, those are the real losers.