﴿ فَلَا صَدَّقَ وَلَا صَلَّىٰ ﴾

“[Useless, though, will be his repentance: for [as long as he was alive] he did not accept the truth, nor did he pray [for enlightenment],”

(For he) i.e. Abu Jahl (neither trusted) neither believed in Allah's divine Oneness, (nor prayed) nor embraced Islam and became of those who perform the prayer.