Proverbs 11:26 describes how people curse hoarders but pray blessings upon those who are willing to sell. Here prayer is about blessing others in contradistinction to cursing. Such kind of prayer is a form of request.
Proverbs 15:8 describes how the prayers of the righteous please God.
Proverbs 15:29 describes how God hears the prayers of the righteous. The righteous can rest assured that the Lord hears their prayers.
Proverbs 28:9 describes how prayers are detestable when the person doing the praying does not listen to God’s instruction.
Proverbs sees a clear connection between the righteousness of the individual who prays and the way God views and receives the prayers.
Finally, Proverbs 31:2 describes the son being the answer to prayer.