Isaiah says offerings, festivals, and assemblies are rejected because they are paired with violence and wrongdoing (Isaiah 1:13-15). The problem is not the rituals alone but hands “full of blood” and ignored justice (Isaiah 1:15-17).
In Isaiah 1:10–15 the speaker calls Judah’s leaders and people by the shocking names “Sodom” and “Gomorrah,” then rejects their worship activity. Sacrifices, incense, festivals, and prayers are described as unwanted, even offensive, because the worshipers’ lives are marked by violence. This unit sits early in Isaiah’s opening indictment of Judah (1:2–31), where the community is pictured as rebellious and seriously damaged, yet still continuing public religion. Verses 10–15 develop a focused complaint: worship that looks abundant on the outside is treated as empty because it is paired with wrongdoing.
Isaiah 1:10–15 presents Yahweh rejecting Judah’s worship practices as they are currently being done. The people are addressed with the shocking names “Sodom” and “Gomorrah,” which functions as a moral comparison, not a literal identification (explicit in the passage’s rhetoric).
A careful answer keeps the immediate passage, the book's argument, and the whole-Bible storyline together, so the question is answered in context instead of as a detached idea.
Start with Isaiah 1:13-15, then read the surrounding section so the answer stays connected to the passage's flow.
13Bring no more vain offerings. Incense is an abomination to me; New moons, Sabbaths, and convocations: I can`t bear with evil assemblies.
14My soul hates your New Moons and your appointed feasts; they are a trouble to me; I am weary of bearing them.
15When you spread forth your hands, I will hide my eyes from you; yes, when you make many prayers, I will not hear: your hands are full of blood.