Luke 1:63

And he asked for a writing tablet, and wrote, saying, His name is John. And they marvelled all.

Writing tablet ... "The tablets in use generally at the time were usually made of wood, covered with a thin coating of wax."[34] Writing on such a tablet was done with a small iron stylus. By this strong statement of the neighbors' efforts to name the child, Zacharias affirmed the word of the angel of God as truth; and his impediment was quickly removed.