A simple verse that teaches us the responsibility of leadership is found in Romans 12:8. The section is discussing spiritual gifts and the importance of operating within your gifting as well as developing and deploying your gift. Take a look at the various versions… (parenthesis mine)
If it (one’s spiritual gift) is leadership, let him govern diligently. (NIV)
If you’re put in charge, don’t manipulate. (MSG)
God has given you leadership ability, take the responsibility seriously. (NLT)
If we are leaders, we should do our best. (CEV)
Anyone who has the gift of being a leader should try hard when he leads. (NCV)
If it (your spiritual gift) is to lead, do it diligently. (TNIV)
The specific interpretations vary but you get the idea. Simply put, if God has called you into leadership, you owe Him your best. No slacking. No shortcuts. No half-hearted effort.
Get on with being the best leader you can possibly be!