diff --git a/airflow/providers/google/cloud/operators/bigquery.py b/airflow/providers/google/cloud/operators/bigquery.py
index d6654141532a..99a15e66d075 100644
--- a/airflow/providers/google/cloud/operators/bigquery.py
+++ b/airflow/providers/google/cloud/operators/bigquery.py
@@ -2739,11 +2739,28 @@ def __init__(
 
     @property
     def sql(self) -> str | None:
+        _sql = getattr(self, "_sql", None)
+        if _sql:
+            return _sql
+
         try:
             return self.configuration["query"]["query"]
         except KeyError:
             return None
 
+    @sql.setter
+    def sql(self, sql_value: str):
+        warnings.warn(
+            (
+                "Assigning value to sql is deprecated. "
+                "This setter will be removed in the next major release and"
+                " will raise an AttributeError when assigning value to sql"
+            ),
+            AirflowProviderDeprecationWarning,
+            stacklevel=2,
+        )
+        self._sql = sql_value
+
     def prepare_template(self) -> None:
         # If .json is passed then we have to read the file
         if isinstance(self.configuration, str) and self.configuration.endswith(".json"):