The Gospel according to St Luke, Chapter 10, verses 25-37:

And behold, a lawyer stood up to put him (Jesus Christ of Nazareth) to the test, saying, “Teacher, what shall I do to inherit eternal life?” He said to him, “What is written in the Law? How do you read it?” And he answered, “You shall love the Lord your God with all your heart and with all your soul and with all your strength and with all your mind, and your neighbor as yourself.” And he said to him, “You have answered correctly; do this, and you will live.” But he, desiring to justify himself, said to Jesus, “And who is my neighbor?” Jesus replied, “A (Jewish) man was going down from Jerusalem to Jericho, and he fell among robbers, who stripped him and beat him and departed, leaving him half dead. Now by chance a (Jewish) priest was going down that road, and when he saw him he passed by on the other side. So likewise a Levite, when he came to the place and saw him, passed by on the other side. But a Samaritan, as he journeyed, came to where he was, and when he saw him, he had compassion. He went to him and bound up his wounds, pouring on oil and wine. Then he set him on his own animal and brought him to an inn and took care of him. And the next day he took out two denarii (two days' wages) and gave them to the innkeeper, saying, ‘Take care of him, and whatever more you spend, I will repay you when I come back.’ Which of these three, do you think, proved to be a neighbor to the man who fell among the robbers?” He said, “The one who showed him mercy.” And Jesus said to him, “You go, and do likewise.”

For historical context, the Jews and Samaritans absolutely despised each other. I think this story works best if you replace the Jewish man, Priest and Levite with contemporary examples from one side and the Samaritan with someone from the opposing side. Eg, The Queer community and a MAGA person, British Unionists and Irish Nationalists (the one I was taught) basically any contemporary group that hates each other.