Hathayoga 1-49

इदं पद्मासनं प्रोक्तं सर्व-व्याधि-विनाशनम् ।
दुर्लभं येन केनापि धीमता लभ्यते भुवि ॥ ४९॥

Idam padmāsanam proktam sarvavyādhivināśanam Durlabham yena kenāpi dhīmatā labhyate bhuvi

This is called the Padmâsana, the destroyer of all diseases. It is difficult of attainment by everybody, but can be learnt by intelligent people in this world.