Reference

Isaiah 58:1-20 and Matthew 5:13-20

Scripture: Isaiah 58:1-10 (CEB) – Shout loudly; don't hold back; raise your voice like a trumpet! Announce to my people their crime, to the house of Jacob their sins. They seek me day after day, desiring knowledge of my ways like a nation that acted righteously, that didn't abandon their God. They ask me for righteous judgments, wanting to be close to God. 
"Why do we fast and you don't see; why afflict ourselves and you don't notice?"
Yet on your fast day you do whatever you want, and oppress all your workers. You quarrel and brawl, and then you fast; you hit each other violently with your fists. You shouldn't fast as you are doing today if you want to make your voice heard on high. Is this the kind of fast I choose, a day of self-affliction, of bending one's head like a reed and of lying down in mourning clothing and ashes? Is this what you call a fast, a day acceptable to the Lord? Isn't this the fast I choose: releasing wicked restraints, untying the ropes of a yoke, setting free the mistreated, and breaking every yoke? Isn't is sharing your bread with the hungry and bringing the homeless poor into your house, covering the naked when you see them, and not hiding from your own family? Then your light will break out like the dawn, and you will be healed quickly. Your own righteousness will walk before you, and the Lord's glory will be your rear guard. Then you will call, and the Lord will answer; you will cry for help, and God will say, "I'm here." If you remove the yoke from among you, the finger-pointing, the wicked speech; if you open your heart to the hungry, and provide abundantly for those who are afflicted, your light will shine in the darkness, and your gloom will be like the noon.

Scripture: Matthew 5:13-20 – "You are the salt of the earth. But if salt loses its saltiness, how will it become salty again? It's good for nothing except to be thrown away and trampled under people's feet. You are the light of the world. A city on top of a hill can't be hidden. Neither do people light a lamp and put it under a basket. Instead, they put it on top of a lampstand, and it shines on all who are in the house. In the same way, let your light shine before people, so they can see the good things you do and praise your Father who is in heaven. 
"Don't even begin to think that I have come to do away with the Law and the Prophets. I haven't come to do away with them but to fulfill them. I say to you very seriously that as long as heaven and earth exist, neither the smallest letter nor even the smallest stroke of a pen will be erased from the Law until everything there becomes a reality. Therefore, whoever ignores one of the least of these commands and teaches others to do the same will be called the lowest in the kingdom of heaven. But whoever keeps these commands and teaches people to keep them will be called great in the kingdom of heaven. I say to you that unless your righteousness is greater than the righteousness of the legal experts and the Pharisees, you will never enter the kingdom of heaven."