SB 10.88.23
sa tad-vara-pariksartham
sambhor murdhni kilasurah
sva-hastam dhatum arebhe
so ’bibhyat sva-krtac chivah
Translation:
To test Lord Sambhu’s benediction, the demon then tried to put his hand on the Lord’s head. Thus Siva was frightened because of what he himself had done.