English: “You shall not do so…” — One who erases the Name incurs lashes; the prohibition is derived from here: “and you shall destroy their name — you shall not do so to Hashem your God.”
On the daf / in context: The same negative command that forbids destructive treatment of sacred objects also prohibits erasing the Divine Name.
Type of Learning
Derash on the verse (Sifrei) — source for the prohibition against erasing the Name.
What Is Learned
Erasing the Divine Name is a prohibition punishable by lashes.