( الذين ) حبسوا أنفسهم في الصوامع . وقال علي بن أبي طالب : هم أهل حروراء ( ضل سعيهم ) بطل عملهم واجتهادهم ( في الحياة الدنيا وهم يحسبون أنهم يحسنون صنعا ) أي عملا .
Those who will see on the Day of Judgment that the effort they used to make in the world has gone to waste, whilst they thought they were doing well in their effort and that they will benefit from their actions. The reality was the exact opposite.