One verse

Srimad Bhagavatam 9.14.44-45

9.14.44-45

स्थालीस्थानं गतोऽश्वत्थं शमीगर्भं विलक्ष्य स: । तेन द्वे अरणी कृत्वा उर्वशीलोककाम्यया ॥ ४४ ॥ उर्वशीं मन्त्रतो ध्यायन्नधरारणिमुत्तराम् । आत्मानमुभयोर्मध्ये यत् तत् प्रजननं प्रभु: ॥ ४५ ॥

sthali-sthanam gato ’svattham sami-garbham vilaksya sah tena dve arani krtva urvasi-loka-kamyaya urvasim mantrato dhyayann adhararanim uttaram atmanam ubhayor madhye yat tat prajananam prabhuh

sthali-sthanam
the place where Agnisthali was left
gatah
going there
asvattham
an asvattha tree
sami-garbham
produced from the womb of the sami tree
vilaksya
seeing
sah
he, Pururava
tena
from that
dve
two
arani
pieces of wood required for igniting a fire for sacrifice
krtva
making
urvasi-loka-kamyaya
desiring to go to the planet where Urvasi was present
urvasim
Urvasi
mantratah
by chanting the required mantra
dhyayan
meditating upon
adhara
lower
aranim
arani wood
uttaram
and the upper one
atmanam
himself
ubhayoh madhye
in between the two
yat tat
that which (he meditated upon)
prajananam
as a son
prabhuh
the King

When the process of fruitive yajna became manifest within his heart, King Pururava went to the same spot where he had left Agnisthali. There he saw that from the womb of a sami tree, an asvattha tree had grown. He then took a piece of wood from that tree and made it into two aranis. Desiring to go to the planet where Urvasi resided, he chanted mantras, meditating upon the lower arani as Urvasi, the upper one as himself, and the piece of wood between them as his son. In this way he began to ignite a fire.