The Lord responds with a reassuring word to the cast down and to David who presented the request. The Lord God does see the oppression of the weak and he hears the groaning of the needy. After the prayer, the Lord says he will arise and protect them from those who malign them.
I note that there are times when some do experience oppression and groaning. Verse 1 tells me that these people were most likely not godly from the beginning. Most were liars just as their oppressors still are. However, others were more clever in their evil schemes and they lost, falling to the bottom of society. At the bottom they repented, called out to the Lord, and awaited his deliverance. Such is the case of Israel as recorded in the book of Judges. Such is the case for many today.
When God responds with the awaited yes I can be sure that his will expressed in words will come to be (6). This is in sharp contrast with the boastful words of the adversaries. Every word in the Holy Bible is true, exact, and trustworthy. Those who call on the name of the Lord and trust in him during the waiting can take his words to heart. Believe, wait, and trust in the day of deliverance.