Final answer:
The Emancipation Proclamation indicates the freeing of slaves is partly for moral reasons in the entire document.
Step-by-step explanation:
The specific language in the Emancipation Proclamation that indicates the freeing of slaves is partly for moral reasons can be found in the entire document. The document states that the slaves in the areas of rebellion against the United States shall be then, thenceforward, and forever free. This language suggests that the purpose of the proclamation was to end slavery as a moral imperative.