SB 6.18.59
nadhyagacchad vrata-cchidram
tat-paro ’tha mahi-pate
cintam tivram gatah sakrah
kena me syac chivam tv iha
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
O master of the entire world, when Indra could find no faults, he thought, “How will there be good fortune for me?” Thus he was full of deep anxiety.