The Bible is filled with verses that teach us about prayer:

Philippians 4:6-7

6 do not be anxious about anything, but in everything by prayer and supplication with thanksgiving let your requests be made known to God. 7 And the peace of God, which surpasses all understanding, will guard your hearts and your minds in Christ Jesus.

James 5:13-18

13 Is anyone among you suffering? Let him pray. Is anyone cheerful? Let him sing praise. 14 Is anyone among you sick? Let him call for the elders of the church, and let them pray over him, anointing him with oil in the name of the Lord. 15 And the prayer of faith will save the one who is sick, and the Lord will raise him up. And if he has committed sins, he will be forgiven. 16 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. 17 Elijah was a man with a nature like ours, and he prayed fervently that it might not rain, and for three years and six months it did not rain on the earth. 18 Then he prayed again, and heaven gave rain, and the earth bore its fruit.

1 John 5:14

And this is the confidence that we have toward him, that if we ask anything according to his will he hears us.

Romans 12:12

Rejoice in hope, be patient in tribulation, be constant in prayer.