Rejoicing in what Allah has bestowed upon them of His bounty, and they receive good tidings about those [to be martyred] after them who have not yet joined them - that there will be no fear concerning them, nor will they grieve.
Tafseer
{ فرحين } حال من ضمير يُرزقون { بما آتاهم الله من فضله و } هم { يستبشرون } يفرحون { بالذين لم يلحقوا بهم من خلفهم } من إخوانهم المؤمنين ويبدل من الذين { أ } نْ أي بأن { لا خوف عليهم } أي الذين لم يلحقوا بهم { ولا هم يحزنون } في الآخرة المعنى يفرحون بأمنهم وفرحهم .
Happy case of conscience and well including gave them God's bounty and they rejoice rejoice those who did not catch them from behind of their fellow believers and switches of those a n any that do not fear them any who did not catch them nor shall they grieve rejoice in the afterlife meaning and joy to their security.