According to the Scrum Guide1, there are five values that guide decisions within Scrum teams:
Commitment
Focus
Openness
Respect
Courage
In order to achieve the benefits of Scrum, it is important to enact these values. Two actions that demonstrate the commitment of Scrum Team members are:
Help the other Scrum Team members, as they work together as a self-organizing team to accomplish the Sprint Goal and create the anticipated Increment by the end of the Sprint.
Do your best, as they strive to deliver a potentially releasable Increment that meets the definition of "Done" and provides value to the stakeholders.