SB 6.18.61

TEXT 61
 
TEXT
लब्ध्वा तदन्तरं शक्रो निद्रापहृतचेतसः ।
दितेः प्रविष्ट उदरं योगेशो योगमायया ॥ ६१ ॥
labdhva tad-antaram sakro
nidrapahrta-cetasah
diteh pravista udaram
yogeso yoga-mayaya
labdhva-finding; tat-antaram-after that; sakrah-Indra; nidra-by sleep; apahrta-cetasah-unconscious; diteh-of Diti; pravistah-entered; udaram-the womb; yoga-isah-the master of yoga; yoga-of yogic perfections; mayaya-by the power.
TRANSLATION
Finding this fault, Indra, who has all the mystic powers [the yoga-siddhis such as anima and laghima], entered Diti's womb while she was unconscious, being fast asleep.
PURPORT
A perfectly successful yogi is expert in eight kinds of perfection. By one of them, called anima-siddhi, he can become smaller than an atom, and in that state he can enter anywhere. With this yogic power, Indra entered the womb of Diti while she was pregnant.