"Well actually..." he replied, about to correct him, but he decided not to bother. It was quite clear that this Dwarf was a stubborn creature and he would just have to accept that this was the creatures way. Just as he had come to accept the universe was unkind, but only because of those who made it that way.
"Then give me your word... " he said, looking to Thorin. "On your honour as a Dwarf, or your the honour of your forefathers, whatever you want, just give me your word that your weapon will only be raised in defence, be it of yourself or the people on the TARDIS"