diff --git a/mirai-core/src/commonMain/kotlin/net.mamoe.mirai/message/FriendMessage.kt b/mirai-core/src/commonMain/kotlin/net.mamoe.mirai/message/FriendMessage.kt
index b9d0a8138..e0075ddd5 100644
--- a/mirai-core/src/commonMain/kotlin/net.mamoe.mirai/message/FriendMessage.kt
+++ b/mirai-core/src/commonMain/kotlin/net.mamoe.mirai/message/FriendMessage.kt
@@ -13,15 +13,24 @@ import net.mamoe.mirai.Bot
 import net.mamoe.mirai.contact.QQ
 import net.mamoe.mirai.event.BroadcastControllable
 import net.mamoe.mirai.message.data.MessageChain
+import net.mamoe.mirai.message.data.MessageSource
 import net.mamoe.mirai.message.data.OnlineMessageSource
 import net.mamoe.mirai.message.data.source
 import net.mamoe.mirai.utils.getValue
 import net.mamoe.mirai.utils.unsafeWeakRef
 
+/**
+ * 好友消息
+ */
 class FriendMessage(
     sender: QQ,
     override val message: MessageChain
 ) : ContactMessage(), BroadcastControllable {
+    init {
+        val source = message.getOrNull(MessageSource) ?: error("Cannot find MessageSource from message")
+        check(source is OnlineMessageSource.Incoming.FromFriend) { "source provided to a FriendMessage must be an instance of OnlineMessageSource.Incoming.FromFriend" }
+    }
+
     override val sender: QQ by sender.unsafeWeakRef()
     override val bot: Bot get() = sender.bot
     override val subject: QQ get() = sender
diff --git a/mirai-core/src/commonMain/kotlin/net.mamoe.mirai/message/GroupMessage.kt b/mirai-core/src/commonMain/kotlin/net.mamoe.mirai/message/GroupMessage.kt
index 883a25caa..fc961d633 100644
--- a/mirai-core/src/commonMain/kotlin/net.mamoe.mirai/message/GroupMessage.kt
+++ b/mirai-core/src/commonMain/kotlin/net.mamoe.mirai/message/GroupMessage.kt
@@ -15,6 +15,7 @@ import net.mamoe.mirai.contact.Member
 import net.mamoe.mirai.contact.MemberPermission
 import net.mamoe.mirai.event.Event
 import net.mamoe.mirai.message.data.MessageChain
+import net.mamoe.mirai.message.data.MessageSource
 import net.mamoe.mirai.message.data.OnlineMessageSource
 import net.mamoe.mirai.message.data.source
 import net.mamoe.mirai.utils.getValue
@@ -30,6 +31,11 @@ class GroupMessage(
     sender: Member,
     override val message: MessageChain
 ) : ContactMessage(), Event {
+    init {
+        val source = message.getOrNull(MessageSource) ?: error("Cannot find MessageSource from message")
+        check(source is OnlineMessageSource.Incoming.FromGroup) { "source provided to a GroupMessage must be an instance of OnlineMessageSource.Incoming.FromGroup" }
+    }
+
     override val sender: Member by sender.unsafeWeakRef()
     val group: Group get() = sender.group
     override val bot: Bot get() = sender.bot
diff --git a/mirai-core/src/commonMain/kotlin/net.mamoe.mirai/message/TempMessage.kt b/mirai-core/src/commonMain/kotlin/net.mamoe.mirai/message/TempMessage.kt
index f02688e16..3b4062979 100644
--- a/mirai-core/src/commonMain/kotlin/net.mamoe.mirai/message/TempMessage.kt
+++ b/mirai-core/src/commonMain/kotlin/net.mamoe.mirai/message/TempMessage.kt
@@ -4,19 +4,31 @@ import net.mamoe.mirai.Bot
 import net.mamoe.mirai.contact.Member
 import net.mamoe.mirai.event.BroadcastControllable
 import net.mamoe.mirai.message.data.MessageChain
+import net.mamoe.mirai.message.data.MessageSource
 import net.mamoe.mirai.message.data.OnlineMessageSource
 import net.mamoe.mirai.message.data.source
+import net.mamoe.mirai.utils.SinceMirai
 import net.mamoe.mirai.utils.getValue
 import net.mamoe.mirai.utils.unsafeWeakRef
 
+/**
+ * 临时会话消息
+ */
+@SinceMirai("0.35.0")
 class TempMessage(
     sender: Member,
     override val message: MessageChain
 ) : ContactMessage(), BroadcastControllable {
+    init {
+        val source = message.getOrNull(MessageSource) ?: error("Cannot find MessageSource from message")
+        check(source is OnlineMessageSource.Incoming.FromTemp) { "source provided to a TempMessage must be an instance of OnlineMessageSource.Incoming.FromTemp" }
+    }
+
     override val sender: Member by sender.unsafeWeakRef()
     override val bot: Bot get() = sender.bot
     override val subject: Member get() = sender
     override val source: OnlineMessageSource.Incoming.FromTemp get() = message.source as OnlineMessageSource.Incoming.FromTemp
 
-    override fun toString(): String = "TempMessage(sender=${sender.id} from group(${sender.group.id}), message=$message)"
+    override fun toString(): String =
+        "TempMessage(sender=${sender.id} from group(${sender.group.id}), message=$message)"
 }
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