"He seized it by the hilt, that heavy wonder-sword grasped in his hands the gold-gleaming handle raised it in anger rage in his heart swung at her neck with his strong handgrip till it bit through the flesh" (lines 1562-1566). Beowulf kills Grendel's mother.
"His thanes received him thankful to their God for bringing him back from that baleful journey safe from his fight with that foul death-mother" (lines 1627-1629). Beowulf's followers are happy to see that he is alive.
"Both man-killers are banished from Herot hall of the Danes. I promise you this night, proud land-master, you may sleep soundly sorrowing no more." (lines 1670-1673) Beowulf says the Danes won't need to worry about Grendel or his mother again.