﴿ ۞ 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”

(They rejoice because of favour from Allah) because of a reward from Allah (and kindness) and honour, (and that Allah wasteth not) thwarts not (the wage of the believers) regarding jihad, i.e. that which befalls them in the course of jihad.