Servant leaders make good on their promises. 

The story of Hannah in the opening of 1 Samuel demonstrates the gravity of remembrance, grace, and vows.  Hannah, barren and distressed, pours out her soul to the Lord and trusts in the blessing of promise from Eli, the priest.  The Lord remembers her, extending grace through the birth of a son. But the remembrance doesn't stop with the favor of the Lord. Hannah dedicates her young son, Samuel, to the Lord, in remembrance of her vow and the grace extended to her. 

Hannah exemplifies what we seek in our leaders - one who negotiates for the sake of all and makes good on her promises.