SB 4.1.23
tat-pradurbhava-samyoga-
vidyotita-mana munih
uttisthann eka-padena
dadarsa vibudharsabhan
Translation:
The sage was standing on one leg, but as soon as he saw that the three deities had appeared before him, he was so pleased to see them all together that despite great difficulty he approached them on one leg.