Srimad Bhagavatam Canto 03, Chapter 13, Text 19

SB 3.13.19

tasyabhipasyatah kha-sthah
 ksanena kila bharata
gaja-matrah pravavrdhe
 tad adbhutam abhun mahat
 
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada: 
 
O descendant of Bharata, while Brahma was observing Him, that boar became situated in the sky in a wonderful manifestation as gigantic as a great elephant.
Srimad Bhagavatam Canto 03, Chapter 13, Text 18
Srimad Bhagavatam Canto 03, Chapter 13, Text 20