Here are many Bible verses about prayer.

Do not be anxious about anything, but in everything by prayer and supplication with thanksgiving let your requests be made known to God.- Philippians 4:6

Pray without ceasing,- 1 Thessalonians 5:17

But when you pray, go into your room and shut the door and pray to your Father who is in secret. And your Father who sees in secret will reward you.- Matthew 6:6

Likewise the Spirit helps us in our weakness. For we do not know what to pray for as we ought, but the Spirit himself intercedes for us with groanings too deep for words.- Romans 8:26

Therefore, confess your sins to one another and pray for one another, that you may be healed. The prayer of a righteous person has great power as it is working.- James 5:16

Praying at all times in the Spirit, with all prayer and supplication. To that end keep alert with all perseverance, making supplication for all the saints,- Ephesians 6:18

First of all, then, I urge that supplications, prayers, intercessions, and thanksgivings be made for all people, for kings and all who are in high positions, that we may lead a peaceful and quiet life, godly and dignified in every way. This is good, and it is pleasing in the sight of God our Savior, who desires all people to be saved and to come to the knowledge of the truth.- 1 Timothy 2:14

When the righteous cry for help, the Lord hears and delivers them out of all their troubles.- Psalm 34:17

Continue steadfastly in prayer, being watchful in it with thanksgiving.- Colossians 4:2

Rejoice in hope, be patient in tribulation, be constant in prayer.- Romans 12:12

The Lord is far from the wicked, but he hears the prayer of the righteous.- Proverbs 15:29

The Lord is near to all who call on him, to all who call on him in truth.- Psalm 145:18

If we confess our sins, he is faithful and just to forgive us our sins and to cleanse us from all unrighteousness.- 1 John 1:9