diff --git a/runtime/doc/builtin.txt b/runtime/doc/builtin.txt
index 9ac79c6..4bbf506 100644
--- a/runtime/doc/builtin.txt
+++ b/runtime/doc/builtin.txt
@@ -1,4 +1,4 @@
-*builtin.txt*	For Vim version 9.1.  Last change: 2024 Jan 05
+*builtin.txt*	For Vim version 9.1.  Last change: 2024 Jan 13
 
 
 		  VIM REFERENCE MANUAL	  by Bram Moolenaar
@@ -198,6 +198,8 @@
 foldlevel({lnum})		Number	fold level at {lnum}
 foldtext()			String	line displayed for closed fold
 foldtextresult({lnum})		String	text for closed fold at {lnum}
+foreach({expr1}, {expr2})	List/Dict/Blob/String
+					for each item in {expr1} call {expr2}
 foreground()			Number	bring the Vim window to the foreground
 fullcommand({name} [, {vim9}])	String	get full command from {name}
 funcref({name} [, {arglist}] [, {dict}])
@@ -2995,6 +2997,45 @@
 
 		Can also be used as a |method|: >
 			GetLnum()->foldtextresult()
+
+foreach({expr1}, {expr2})					*foreach()*
+		{expr1} must be a |List|, |String|, |Blob| or |Dictionary|.
+		For each item in {expr1} execute {expr2}. {expr1} is not
+		modified; its values may be, as with |:lockvar| 1. *E741*
+		See |map()| and |filter()| to modify {expr1}.
+
+		{expr2} must be a |string| or |Funcref|.
+
+		If {expr2} is a |string|, inside {expr2} |v:val| has the value
+		of the current item.  For a |Dictionary| |v:key| has the key
+		of the current item and for a |List| |v:key| has the index of
+		the current item.  For a |Blob| |v:key| has the index of the
+		current byte. For a |String| |v:key| has the index of the
+		current character.
+		Examples: >
+			call foreach(mylist, 'used[v:val] = true')
+<		This records the items that are in the {expr1} list.
+
+		Note that {expr2} is the result of expression and is then used
+		as a command.  Often it is good to use a |literal-string| to
+		avoid having to double backslashes.
+
+		If {expr2} is a |Funcref| it must take two arguments:
+			1. the key or the index of the current item.
+			2. the value of the current item.
+		With a legacy script lambda you don't get an error if it only
+		accepts one argument, but with a Vim9 lambda you get "E1106:
+		One argument too many", the number of arguments must match.
+		If the function returns a value, it is ignored.
+
+		Returns {expr1} in all cases.
+		When an error is encountered while executing {expr2} no
+		further items in {expr1} are processed.
+		When {expr2} is a Funcref errors inside a function are ignored,
+		unless it was defined with the "abort" flag.
+
+		Can also be used as a |method|: >
+			mylist->foreach(expr2)
 <
 							*foreground()*
 foreground()	Move the Vim window to the foreground.  Useful when sent from