It is narrated from Hazrat Abu Huraira (may Allah be pleased with him) that the Noble Prophet (peace and blessings be upon him) said: Every inhabitant of Hell is shown his expected place in Paradise, and he wishes that if only Allah had honored him with guidance, and this becomes a cause of regret for him. Similarly, every inhabitant of Paradise is shown his expected place in Hell, and he thinks that if Allah had not guided me, I would have been here, and then he gives thanks for this.
Hadith Referenceمسند احمد / مسند المكثرين من الصحابة / 10652