Rasulullaah ﷺ once said to the Sahabah (RA), “Every person will have regrets after death”. When the Sahabah (RA) asked why this will be so, Rasulullaah ﷺ replied, “If he had been a good person, he will regret why he did not do even more good and if he is a sinner, he will regret not restraining himself from those sins.”

[Tirmidhi 2403, from Hadhrat Abu Hurayrah (RA)]