The right hand
of the Lord symbolises his strength - both his saving protection (see Psalm 98:1) and his all-destructive power. In this context, the removal of God’s right hand meant that his protection has been withdrawn, leaving the city vulnerable to enemy attack.
3 Il a, dans son ardente colère, abattu toute la force d'Israël; Il a retiré sa droite en présence de l'ennemi; Il a allumé dans Jacob des flammes de feu, Qui dévorent de tous côtés.