Ibn Mas‘ūd (may Allah be pleased with him) reported: The Prophet (may Allah's peace and blessings be upon him) said: 'Paradise is nearer to one of you than his shoelace, and so is Hellfire."
شرح الحديث :
The Prophet (may Allah's peace and blessings be upon him) said that Paradise and Hellfire are nearer to a person than the leather strap over his feet, which is so close to him. This is because a person may do an act that pleases Allah not thinking it will earn him a great reward, yet it takes him to the Garden of Bliss. Alternatively, a person may commit a sin to which he does not pay much attention, but it incurs the displeasure of Allah and causes him to sink deeply into Hell-fire for so many years – and he was unaware of that.