Through the Rubble and Words of Hope are the first quests in Chapter 13, "A Broken World", in Final Fantasy VII Remake. Cloud Strife, Tifa Lockhart, and Barret Wallace walk through the debris in the Sector 6 Slums.
As the quest starts, follow Tifa forward under the debris, then push the debris. After a cutscene, move forward down a linear path towards Wall Market, and a cutscene commences. After this, travel north through Wall Market, following Barret. Cloud can also talk to Andrea Rhodea and Madam M along the way for a little dialogue. Continue following Barret, and at some point, he will turn around and speak a few lines of dialogue. Continue north past him, and keep west at the fork to go to Sector 5 slums. After reaching the Sector 5 Center District, head west to Aerith's house.