Gera

When King David arrived at Bachurim, there came out from there a man from Sha'ul's family named Shim'i the son of Gera; and he came out pronouncing curses

Shim'i the son of Gera, the Binyamini from Bachurim, hurried and came down with the men of Y'hudah to meet King David.

to ferry the king's household across and do whatever else the king wanted done. Shim'i the son of Gera fell down before the king when he was ready to cross the Yarden

"Finally, you have with you Shim'i the son of Gera the Binyamini, from Bachurim. He laid a terrible curse on me when I was on my way to Machanayim; but he came down to meet me at the Yarden; so I swore to him by ADONAI that I would not have him put to death with the sword.