Quis separabit?

Cap badge of the Royal Ulster Rifles
Quis separabit? – Irish Guards drummer's full dress

Quis separabit? (Who will separate [us]?) is a Latin motto derived from the Vulgate translation of Romans 8:35:

"Quis ergō nōs sēparābit ā cāritāte Christī...",

translated into English as "Who shall separate us from the love of Christ?"