tad adbhutam abhūn mahat

tasya-his; abhipasyatah-while thus observing; khasthah-situated in the sky; ksanena-suddenly; kila-verily; bharata-O descendant of Bharata; gajamatrah-just like an elephant; pravavrdhe-thoroughly expanded; tat-that; adbhutam-extraordinary; abhut-transformed; mahat-into a gigantic body.