maNNum malaiyum maRikadalum mArudhamum
viNNum vizhungkiyadhu mey enbar - eNNil
alagaLavu kaNda sIrAzhiyAykku anRu iv
vulagaLavum uNdO? un vAy

Meaning:

enbar 				- They (rishis) say
mey 				- that it is true that
vizhungkiyadhu 			- You swallowed
maNNum 				- the earth,
malaiyum 			- the mountains (kula parvatas),
maRi kadalum 			- the ocean with its waves,
mArudhamum 			- the wind,
viNNum 				- and space.
eNNil 				- If analyzed,
aLavu kaNda sIr 		- You who has immeasurable auspicious qualities
alagu 				- (that go beyond any) measure,
AzhiyAykku 			- who has the Sudarshana Chakra,
uNdO 				- was
un vAy 				- Your mouth,
ivvulgu aLavum 			- the size of this world
anRu 				- at that time?

Vyakhyana Saram:
Not only will He take a big form (Sri Varaha) and do a small act (of lifting the small world), He will also take a small form (as a baby) and do a great act (of protecting everything in His stomach during praLaya).