This sound effect can be found on Dimension Sound Effects Library, which was made by Sound Ideas. Although it is labelled as a lion sound, it may have actually been recorded from an elephant growling. Links: https://soundideas.sourceaudio.com/track/24868946 https://soundeffects.fandom.com/wiki/Sound_Ideas,_ANIMAL,_LION_-_LION_ROARS#Audio_Samples