'Maintain' in the Bible

The Lord is the portion of my inheritance, my cup [He is all I need];You support my lot.

Even the stock which Your right hand has planted,And [look down on] the son that You have reared and strengthened for Yourself.

Vindicate the weak and fatherless;Do justice and maintain the rights of the afflicted and destitute.

I know [with confidence] that the Lord will maintain the cause of the afflicted,And [will secure] justice for the poor.