God commands David to build an alter in Jerusalem which ultimately becomes the site of the temple in Solomon’s reign (2 Samuel 24: 18-25). Araunah owned the site where the alter was to be built and offered to give it to David along with the oxen to sacrifice.  However, David responded, “But the king said to Araunah, “No, but I will buy it from you for a price. I will not offer burnt offerings to the LORD my God that cost me nothing.” So David bought the threshing floor and the oxen for fifty shekels of silver” (2 Samuel 24:24 ESV).  This is a great reminder that whatever we bring before God as an offering and act of worship (whether it is money, time, giving up fleshly deeds, etc.) must be done with the intent to sacrifice something.  We can be guilty of trying to shortchange God and make our sacrifices as painless and as cheap as possible.  If there is no real sacrifice, there is no real homage paid to God.  Jesus exemplified this most magnificently on the cross to redeem mankind which ultimately glorified His father.  The cross cost Him His life, but there was nothing that could have honored His Father more.