All our worship is fundamentally an offering. Anne Ortlund wrote, Weekly worship is the highest corporate act of the Body of Christ. It is the visible demonstration that He is Priority One to us, and to our church. Worship is proclaiming that God is worthy of all our praise and honor. And worship is not to be limited to Sunday morning between 10 and 11 am.
Worship is an ongoing, daily activity.
When Jesus talked about how the people were to practice their piety that is, go about their religious observances he talked about worship with an attitude. If our attitude toward giving and prayer and fasting is one in which we do these things for what we can get out of them, then we have missed the whole point. Jesus says that our religious acts are to be done for God. He is the one worthy of worship. He is the focus of our devotion.