Why does a human’s fist remain clenched when they enter the world and open when they leave it?

Ibn Al-Qayyim, may Allāh have mercy on him, explained: "The clenching of the fist upon entering the world symbolises the inherent eagerness and greed which one arrives with, while the opening of the hand upon leaving signifies departing from the world empty-handed." [At-Tibyān fī Aymān Al-Qur'ān, p. 545.] Source: https://whatsapp.com/channel/0029VaDlIsw6BIEcpVCHOl3v