Psalm 51:3-17 and Joel 2:12-18

Psalm 51:3-17
3 Be merciful to me, O God, according to your great mercy. And, according to the plentitude of your compassion, wipe out my iniquity.
4 Wash me once again from my iniquity, and cleanse me from my sin.
5 For I know my iniquity, and my sin is ever before me.
6 Against you only have I sinned, and I have done evil before your eyes. And so, you are justified in your words, and you will prevail when you give judgment.
7 For behold, I was conceived in iniquities, and in sinfulness did my mother conceive me.
8 For behold, you have loved truth. The obscure and hidden things of your wisdom, you have manifested to me.
9 You will sprinkle me with hyssop, and I will be cleansed. You will wash me, and I will be made whiter than snow.
10 In my hearing, you will grant gladness and rejoicing. And the bones that have been humbled will exult.
11 Turn your face away from my sins, and erase all my iniquities.
12 Create a clean heart in me, O God. And renew an upright spirit within my inmost being.
13 Do not cast me away from your face; and do not take your Holy Spirit from me.
14 Restore to me the joy of your salvation, and confirm me with an unsurpassed spirit.
15 I will teach the unjust your ways, and the impious will be converted to you.
16 Free me from blood, O God, the God of my salvation, and my tongue will extol your justice.
17 O Lord, you will open my lips, and my mouth will announce your praise.
Joel 2:12-18
12 Now, therefore, the Lord says: "Be converted to me with your whole heart, in fasting and weeping and mourning."
13 And rend your hearts, and not your garments, and convert to the Lord your God. For he is gracious and merciful, patient and full of compassion, and steadfast despite ill will.
14 Who knows if he might convert and forgive, and bequeath a blessing after him, a sacrifice and a libation to the Lord your God?
15 Blow the trumpet in Zion, sanctify a fast, call an assembly.
16 Gather the people, sanctify the church, unite the elders, gather together the little ones and infants at the breast. Let the bridegroom depart from his bed, and the bride from her bridal chamber.
17 Between the vestibule and the altar, the priests, the ministers of the Lord, will weep, and they will say: "Spare, O Lord, spare your people. And do not bequeath your inheritance into disgrace, so that the nations would rule over them. Why should they say among the peoples, 'Where is their God?' "
18 The Lord has been zealous for his land, and he has spared his people.