diff --git a/docs/en/engines/table-engines/mergetree-family/mergetree.md b/docs/en/engines/table-engines/mergetree-family/mergetree.md
index 9d259456ea5..f0cdd75f90d 100644
--- a/docs/en/engines/table-engines/mergetree-family/mergetree.md
+++ b/docs/en/engines/table-engines/mergetree-family/mergetree.md
@@ -76,7 +76,7 @@ For a description of parameters, see the [CREATE query description](../../../sql
 
 -   `SAMPLE BY` — An expression for sampling. Optional.
 
-    If a sampling expression is used, the primary key must contain it. Example: `SAMPLE BY intHash32(UserID) ORDER BY (CounterID, EventDate, intHash32(UserID))`.
+    If a sampling expression is used, the primary key must contain it. The result of sampling expression must be unsigned integer. Example: `SAMPLE BY intHash32(UserID) ORDER BY (CounterID, EventDate, intHash32(UserID))`.
 
 -   `TTL` — A list of rules specifying storage duration of rows and defining logic of automatic parts movement [between disks and volumes](#table_engine-mergetree-multiple-volumes). Optional.
 
diff --git a/docs/en/operations/settings/merge-tree-settings.md b/docs/en/operations/settings/merge-tree-settings.md
index a4fd0869629..6c98187ebbf 100644
--- a/docs/en/operations/settings/merge-tree-settings.md
+++ b/docs/en/operations/settings/merge-tree-settings.md
@@ -280,14 +280,14 @@ Default value: `0`.
 
 ## check_sample_column_is_correct {#check_sample_column_is_correct}
 
-Enables to check column or column by hash for sampling is correct at creation table.
+Enables to check column for sampling or sampling expression is correct at creation table.
 
 Possible values:
 
--   true  — Check column for sampling is correct at creation table
--   false — Check column for sampling is correct at creation table will be ignored.
+-   true  — Check column or sampling expression is correct at creation table
+-   false — Check column or sampling expression is at creation table will be ignored.
 
 Default value: `true`.
 
-By default, the ClickHouse server check sampling condition at creation table. If you already had tables with incorrect sampling condition, set value `false` to make ClickHouse server do not raise exception when ClickHouse server is starting.
+By default, the ClickHouse server check column for sampling or sampling expression at creation table. If you already had tables with incorrect sampling expression, set value `false` to make ClickHouse server do not raise exception when ClickHouse server is starting.
 [Original article](https://clickhouse.tech/docs/en/operations/settings/merge_tree_settings/) <!--hide-->