The Messenger of Allah ﷺ said about the one in spiritual retreat, "He is shielded from sins, and rewards flow to him as if he were performing all good deeds."
حدثنا عبيد الله بن عبد الكريم حدثنا محمد بن أمية حدثنا عيسى بن موسى البخاري عن عبيدة العمي عن فرقد السبخي عن سعيد بن جبير
أن رسول الله ﷺ قال في المعتكف هو يعكف الذنوب ويجرى له من الحسنات كعامل الحسنات كلها
No references are available.
Grading, [Its isnad is daif]Ubayda (with a fatha on the ain) bin Bilal Ammi is of unknown status (Taqrib).Busiri said, "Its isnad is daif due to the weakness of Farqad bin Yaqub Sabakhi, and it has another defect."