It specially emphasizes the holiness of Jehovah; as has been said, in H He is the person to whom the cult is performed, while the question of how is more elaborately dealt with in P. There are stray allusions which almost seem to point to pre-Exilic days; e.
"Introduction to the Old Testament"
John Edgar McFadyen
P throws much light on the usages and ideas of post-Exilic religion.
"Introduction to the Old Testament"
John Edgar McFadyen
In that case, the poem would be Exilic; v.
"Introduction to the Old Testament"
John Edgar McFadyen