Solomon must have been facing the temple as he spoke the previous words because we are told he turned and faced the people. This verse tells us that the first thing that he did as he turned was to bless the people who were assembled, and they stood to receive the blessing.
14 Le roi tourna son visage, et bénit toute l'assemblée d'Israël; et toute l'assemblée d'Israël était debout.