It is narrated from Sayyiduna Abu Hurairah, may Allah be pleased with him, that the Messenger of Allah, peace and blessings be upon him, said: Every inhabitant of Hell will see his place in Paradise and will say: If only Allah had guided me. In this way, this will be a cause of regret for him. And every inhabitant of Paradise will see his place in Hell and will say: If Allah had not guided me, I would have been in that place. In this way, this will be a cause for him to be even more grateful.