‘Moreover the word of Yahweh came to me, saying, “Son of man, take up a lamentation for the King of Tyre, and say to him, Thus says the Lord Yahweh.”
‘Moreover the word of Yahweh came to me --.' The introduction demonstrates that this is a new oracle, in the form of a lamentation. ‘King of Tyre' was probably the title the king took for himself as king of a city state, and the first part of the poem then emphasises his extravagant claims.
‘Thus says the Lord Yahweh.' However the king may see himself he must recognise, as must Israel, that he is subject to the word of the Lord Yahweh to Whom he is subject.