The twenty-fifth yoga sutra delineates about the strange strength of a yogi, who by intense assimilation of the senses becomes successful in attaining the poise, refinement and might of an elephant. He becomes pretty agile in the process.

balesu by saihyama on strength
hasti elephant
bala strength (physical and intellectual)
adini the others

By sarhyama on strength, the yogi will develop the physical strength, grace, and endurance of an elephant.

By samyama (integration), the yogi may obtain the strength and elegance of an elephant, or if he wishes, develop his powers, so as to become the strongest of the strong, the most graceful of the graceful, the swiftest of the swift.