The Psalmist Expresses His General Confidence In the Fact That God Will In The Future Fight For Them And Act On Their Behalf As He Has In The Past (Psalms 44:4-8).
The Psalmist speaks in the singular as well as in the plural, and speaks of ‘my sword', which suggests that he is the king. But here he allots the supreme Kingship to God, and calls on Him to act as their King and deliver His people. This was part of a King's responsibility. He points out that he is putting all his trust in Him.
‘You are my King, O God,
Command deliverances for Jacob.
Through you will we push down our adversaries,
Through your name will we trample upon under those who rise up against us.'
Addressing God as ‘my King', he calls on Him to exercise His divine power and ‘command' deliverances for Israel (Jacob). Once God has done that he has no doubt that through Him and His mighty power His people will be able to ‘push down' their adversaries, as a wild ox pushes down its foes with its horns, and that through His Name they will be able to trample on those who rise against them, as the wild ox tramples its foes beneath its feet.
‘Through your Name.' The name was seen as expressing the full attributes and character of the One named. It may be that, as YHWH is nowhere mentioned, the ‘Name' referred to is ‘King'.
‘For I will not trust in my bow,
Nor will my sword save me.
But you have saved us from our adversaries,
And have put them to shame who hate us.
In God have we made our boast all the day long,
And we will give thanks to your name for ever. [Selah
He is not prepared to trust to any weapon of his own, neither sword or bow, for he knows the power of his enemies, but his trust will be in God, Who has in the past saved His people from their adversaries, and has put to shame those who hate them. Thus it is in God that they have boasted all the day long, and it is their intention to give thanks to Him for ever. Their whole confidence is in Him. (It is this that makes it so surprising to him that they have faced defeat at the hands of their enemies).
‘Selah.' This may have been a pause in the music, possibly indicating ‘think of that', or a signal for a special blast of music signalling the importance of what has just been said..