David said to all the assembly, Now bless Yahweh your God. All the assembly blessed Yahweh, the God of their fathers, and bowed down their heads, and worshiped Yahweh, and the king.
The reason that older translations are like our version (the ASV) here is that, "The word normally translated `worship' in the O.T. means `to prostrate oneself'."[5] In those days, it was customary thus to honor kings; but in the N.T., Christians are forbidden to honor any man in such a manner.  (See elaboration of this principle in my commentary on Revelation.)[6]