SB 3.20.14
tani caikaikasah srastum
asamarthani bhautikam
samhatya daiva-yogena
haimam andam avasrjan
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
Separately unable to produce the material universe, they combined with the help of the energy of the Supreme Lord and were able to produce a shining egg.