The chapter
Deliverance was not the destination; revelation was. Musa was summoned to the Mount for thirty nights, completed to forty, and in his absence the nation that had walked between walls of sea melted its jewelry into a calf.
On the Mount, Musa asked for the one thing even the greatest prophet of Bani Israel could not be given in this life: "My Lord, show me, let me look at You." The answer did not scold the desire; it demonstrated the impossibility: "You will not see Me; but look at the mountain, if it remains in place, then you will see Me." His Lord manifested to the mountain and leveled it, and Musa fell unconscious. Recovering, he said: "Exalted are You; I turn to You in repentance, and I am the first of the believers." The Codex will return to this scene at its final node, for what Sinai could not bear, the people of Jannah will be granted: the vision of their Lord in the abode that does not perish.
He received the Tablets: "in their inscription guidance and mercy", and descended to catastrophe. The Samiri had shaped a calf that lowed, and the people were circling it: "This is your god and the god of Musa." Harun had warned them and been nearly killed for it. Musa, in a fury the Qur'an does not soften, cast down the Tablets and seized his brother's head, then heard the account, cursed the Samiri's invention, burned the idol and scattered it into the sea. The lesson stood forever: the calf you can burn was never a god.
"And when the anger subsided in Musa, he took up the Tablets", the Qur'an's quiet template for every leader: anger comes, anger must pass, and revelation is picked up again. Seventy men were chosen for the appointed meeting of repentance; the quaking seized them, and Musa prayed the prayer of intercessors: "You are our protector, so forgive us and have mercy on us, and decree for us good in this world and the Hereafter." The answer widened beyond Sinai to include this ummah: "My mercy encompasses all things, and I shall decree it for those who are conscious of Me and give zakah, and those who believe in Our signs; those who follow the unlettered Prophet whom they find written with them in the Torah and the Gospel."
Forty nights on the Mount thus end pointing at a cave in Makkah twenty centuries away.