diff --git a/homeassistant/core.py b/homeassistant/core.py
index 7f0883ca880..da49f30d58a 100644
--- a/homeassistant/core.py
+++ b/homeassistant/core.py
@@ -147,9 +147,42 @@ class ConfigSource(enum.StrEnum):
 
 
 # SOURCE_* are deprecated as of Home Assistant 2022.2, use ConfigSource instead
-SOURCE_DISCOVERED = ConfigSource.DISCOVERED.value
-SOURCE_STORAGE = ConfigSource.STORAGE.value
-SOURCE_YAML = ConfigSource.YAML.value
+_DEPRECATED_SOURCE_DISCOVERED = (ConfigSource.DISCOVERED, "2025.1")
+_DEPRECATED_SOURCE_STORAGE = (ConfigSource.STORAGE, "2025.1")
+_DEPRECATED_SOURCE_YAML = (ConfigSource.YAML, "2025.1")
+
+
+# Can be removed if no deprecated constant are in this module anymore
+def __getattr__(name: str) -> Any:
+    """Check if the not found name is a deprecated constant.
+
+    If it is, print a deprecation warning and return the value of the constant.
+    Otherwise raise AttributeError.
+    """
+    module_globals = globals()
+    if f"_DEPRECATED_{name}" not in module_globals:
+        raise AttributeError(f"Module {__name__} has no attribute {name!r}")
+
+    # Avoid circular import
+    from .helpers.deprecation import (  # pylint: disable=import-outside-toplevel
+        check_if_deprecated_constant,
+    )
+
+    return check_if_deprecated_constant(name, module_globals)
+
+
+# Can be removed if no deprecated constant are in this module anymore
+def __dir__() -> list[str]:
+    """Return dir() with deprecated constants."""
+    # Copied method from homeassistant.helpers.deprecattion#dir_with_deprecated_constants to avoid import cycle
+    module_globals = globals()
+
+    return list(module_globals) + [
+        name.removeprefix("_DEPRECATED_")
+        for name in module_globals
+        if name.startswith("_DEPRECATED_")
+    ]
+
 
 # How long to wait until things that run on startup have to finish.
 TIMEOUT_EVENT_START = 15
diff --git a/tests/test_core.py b/tests/test_core.py
index ce1767f2755..5f5be1b05db 100644
--- a/tests/test_core.py
+++ b/tests/test_core.py
@@ -58,7 +58,11 @@ import homeassistant.util.dt as dt_util
 from homeassistant.util.read_only_dict import ReadOnlyDict
 from homeassistant.util.unit_system import METRIC_SYSTEM
 
-from .common import async_capture_events, async_mock_service
+from .common import (
+    async_capture_events,
+    async_mock_service,
+    import_and_test_deprecated_constant_enum,
+)
 
 PST = dt_util.get_time_zone("America/Los_Angeles")
 
@@ -2621,3 +2625,19 @@ async def test_cancel_shutdown_job(hass: HomeAssistant) -> None:
     cancel()
     await hass.async_stop()
     assert not evt.is_set()
+
+
+@pytest.mark.parametrize(
+    ("enum"),
+    [
+        ha.ConfigSource.DISCOVERED,
+        ha.ConfigSource.YAML,
+        ha.ConfigSource.STORAGE,
+    ],
+)
+def test_deprecated_constants(
+    caplog: pytest.LogCaptureFixture,
+    enum: ha.ConfigSource,
+) -> None:
+    """Test deprecated constants."""
+    import_and_test_deprecated_constant_enum(caplog, ha, enum, "SOURCE_", "2025.1")