SB 8.16.59
tvam canena maha-bhage
samyak cirnena kesavam
atmana suddha-bhavena
niyatatma bhajavyayam
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
O most fortunate lady, establishing your mind in a good spirit, execute this process of payo-vrata and thus worship the Supreme Personality of Godhead, Kesava, who is inexhaustible.