diff --git a/sql-plan-management.md b/sql-plan-management.md
index 7b9b920234044..1f0385b5ed8b7 100644
--- a/sql-plan-management.md
+++ b/sql-plan-management.md
@@ -123,6 +123,7 @@ This statement outputs the execution plan bindings at the GLOBAL or SESSION leve
 | update_time | Updating time |
 | charset | Character set |
 | collation | Ordering rule |
+| source | The way in which a binding is created, including `manual` (created by the `create [global] binding` SQL statement), `capture` (captured automatically by TiDB), and `evolve` (evolved automatically by TiDB) |
 
 ## Baseline capturing
 
diff --git a/sql-statements/sql-statement-show-bindings.md b/sql-statements/sql-statement-show-bindings.md
index c9d9681eb21cd..bc784eb93be76 100644
--- a/sql-statements/sql-statement-show-bindings.md
+++ b/sql-statements/sql-statement-show-bindings.md
@@ -46,6 +46,7 @@ This statement outputs the execution plan bindings at the GLOBAL or SESSION leve
 | update_time | Updated time |
 | charset | Character set |
 | collation | Sorting rule |
+| source | The way in which a binding is created, including `manual` (created by the `create [global] binding` SQL statement), `capture` (captured automatically by TiDB), and `evolve` (evolved automatically by TiDB) |
 
 ## See also