﴿ ۞ يَسْتَبْشِرُونَ بِنِعْمَةٍۢ مِّنَ ٱللَّهِ وَفَضْلٍۢ وَأَنَّ ٱللَّهَ لَا يُضِيعُ أَجْرَ ٱلْمُؤْمِنِينَ ﴾

“they rejoice in the glad tiding of God's blessings and bounty, and [in the promise] that God will not fail to requite the believers”

Joyful in grace in the reward and bounty in addition to it from God and that read wa-anna as a supplement to ni‘matin or wa-inna to denote a new clause God does not let the wage of believers go to waste but rewards them.