Where did God command that in Scripture? You have any chapters and verses to support your claim?
Maybe here:
Let us hold unswervingly to the hope we profess, for he who promised is faithful. And let us consider how we may spur one another on toward love and good deeds, not giving up meeting together, as some are in the habit of doing, but encouraging one anotherand all the more as you see the Day approaching. (Hebrews 10:23-25)
We can certainly encourage each other by testifying of the ways God is working in our lives and I think we do that many times even on this site. We share in each others' victories, in times of prayer need and even when we discuss doctrines of our shared faith. We should spur one another towards love and good works as well as in sound doctrine. We are to: hold to whatever is true, whatever is noble, whatever is right, whatever is pure, whatever is lovely, whatever is admirableif anything is excellent or praiseworthythink about such things. (Philippians 4:7-9)