What is the ruling regarding a drop of sweat falling onto the Mus'haf and being left there, knowing that sweat is pure?

What fell upon the Mus-haf, be it sweat or other impurities, should have been removed and wiped away, out of reverence for it and respect for the Book of Allah, as Allah the Almighty says: "And whoever honors the sacred rites of Allah, it is better for him in the sight of his Lord," and "And whoever honors the شعائر [symbols/rites] of Allah, it is indeed from the piety of hearts."