Charles Spurgeon Commentary Deuteronomy 6:9

"And thou shalt write them upon the door-posts of thy house, and upon thy gates." — Deuteronomy 6:9 (ASV)

And thou shalt write them upon the posts of thy house, and on thy gates.

I could almost wish that this were literally fulfilled much more often than it is. I was charmed, in many a Swiss village, to see a text of Scripture carved on the door post. A text hung up in your houses may often speak when you are silent. We cannot do anything that is superfluous in the way of making known the Word of God.