May my Hand Forget its Skill

May my Hand Forget its Skill is a challenge and achievement/trophy for the Fallout:New Vegas add-on Honest Hearts. To obtain this achievement you have to evacuate the Sorrows with the help of Daniel and Joshua Graham.

Walkthrough
After completing the scouting missions for Daniel, you are given a chance to side with either Joshua Graham or Daniel. Siding with Joshua Graham and completing the subsequent quest will grant the O Daughter of Babylon achievement, siding with Daniel and completing his quests will grant this achievement.

Behind the scenes
The achievement/trophy references Psalm 137:5 of the Bible. According to some translations, it is, "If I forget you, O Jerusalem, may my right hand forget its skill."

Забудь меня, десница моя