1 Samuel 12:19 NIV
The people all said to Samuel, “Pray to the Lord your God for your servants so that we will not die, for we have added to all our other sins the evil of asking for a king.”
Some become careless through forgetting this higher standard. Others are oppressed by their failure to meet this standard on their own, losing sight of God’s forgiveness through Christ.(ESV Notes)
Matthew 5:44,47-48 NIV
But I tell you, love your enemies and pray for those who persecute you,  And if you greet only your own people, what are you doing more than others? Do not even pagans do that?  Be perfect, therefore, as your heavenly Father is perfect.
Matthew 6:9-15 NIV
“This, then, is how you should pray: “ ‘Our Father in heaven, hallowed be your name,  your kingdom come, your will be done, on earth as it is in heaven.  Give us today our daily bread.  And forgive us our debts, as we also have forgiven our debtors.  And lead us not into temptation, but deliver us from the evil one. ‘  For if you forgive other people when they sin against you, your heavenly Father will also forgive you.  But if you do not forgive others their sins, your Father will not forgive your sins.
7 “And when you pray, do not heap up empty phrases as the Gentiles do, for they think that they will be heard for their many words. 8 Do not be like them, for your Father knows what you need before you ask him. 9 Pray then like this: “Our Father in heaven, hallowed be your name. 10 Your kingdom come, your will be done, on earth as it is in heaven. 11 Give us this day our daily bread, 12 and forgive us our debts, as we also have forgiven our debtors. 13 And lead us not into temptation, but deliver us from evil. 14 For if you forgive others their trespasses, your heavenly Father will also forgive you, 15 but if you do not forgive others their trespasses, neither will your Father forgive your trespasses. (Matthew 6:7-15, ESV)
30 Give to everyone who begs from you, and from one who takes away your goods do not demand them back. 31 And as you wish that others would do to you, do so to them. (Luke 6:30-31, ESV)
1 And he told them a parable to the effect that they ought always to pray and not lose heart. 2 He said, “In a certain city there was a judge who neither feared God nor respected man. 3 And there was a widow in that city who kept coming to him and saying, ‘Give me justice against my adversary.’ 4 For a while he refused, but afterward he said to himself, ‘Though I neither fear God nor respect man, 5 yet because this widow keeps bothering me, I will give her justice, so that she will not beat me down by her continual coming.'” 6 And the Lord said, “Hear what the unrighteous judge says. 7 And will not God give justice to his elect, who cry to him day and night? Will he delay long over them? 8 I tell you, he will give justice to them speedily. Nevertheless, when the Son of Man comes, will he find faith on earth?” (Luke 18:1-8, ESV)
15 Now they were bringing even infants to him that he might touch them. And when the disciples saw it, they rebuked them. 16 But Jesus called them to him, saying, “Let the children come to me, and do not hinder them, for to such belongs the kingdom of God. 17 Truly, I say to you, whoever does not receive the kingdom of God like a child shall not enter it.” (Luke 18:15-17, ESV)
18 And a ruler asked him, “Good Teacher, what must I do to inherit eternal life?” 19 And Jesus said to him, “Why do you call me good? No one is good except God alone. 20 You know the commandments: ‘Do not commit adultery, Do not murder, Do not steal, Do not bear false witness, Honor your father and mother.'” 21 And he said, “All these I have kept from my youth.” 22 When Jesus heard this, he said to him, “One thing you still lack. Sell all that you have and distribute to the poor, and you will have treasure in heaven; and come, follow me.” 23 But when he heard these things, he became very sad, for he was extremely rich. 24 Jesus, seeing that he had become sad, said, “How difficult it is for those who have wealth to enter the kingdom of God! 25 For it is easier for a camel to go through the eye of a needle than for a rich person to enter the kingdom of God.” 26 Those who heard it said, “Then who can be saved?” 27 But he said, “What is impossible with man is possible with God.” 28 And Peter said, “See, we have left our homes and followed you.” 29 And he said to them, “Truly, I say to you, there is no one who has left house or wife or brothers or parents or children, for the sake of the kingdom of God, 30 who will not receive many times more in this time, and in the age to come eternal life.” (Luke 18:18-30, ESV)