Bhagavad Gita Chapter 14 Verse 4
भगवद् गीता अध्याय 14 श्लोक 4

सर्वयोनिषु कौन्तेय मूर्तयः सम्भवन्ति याः।
तासां ब्रह्म महद्योनिरहं बीजप्रदः पिता।।14.4।।



हिंदी अनुवाद - स्वामी तेजोमयानंद
।।14.4।। हे कौन्तेय  समस्त योनियों में जितनी मूर्तियाँ (शरीर) उत्पन्न होती हैं? उन सबकी योनि अर्थात् गर्भ है महद्ब्रह्म और मैं बीज की स्थापना करने वाला पिता हूँ।।


Kumara Vaishnava Sampradaya - Commentary
Whatever  forms  that  are  generated  into  existence  from  the  wombs  of
demigods, demons, human, animal, birds, reptile,  fish,  etc.  all  manifest
from the great womb of inanimate existence within the brahman  or  spiritual
substratum pervading all existence and is known  as  prakriti  the  material
substratum pervading physical existence by dint of its  modifications  known
as the three gunas of sattva or goodness, rajas  or  passion  and  tamas  or
nescience. These modifications manifest due to circumstances  based  on  the
individual karma of unlimited jivas or embodied beings who are  embedded  by
the Supreme Lord with the animate aspect  known  as  the  atma  or  immortal
soul. This is the cause of all created beings and thus Lord Krishna is  thus
the father of all. The primary reason for such diverse generating  of  jivas
will be given next.