Verse 37

न तस्येन्द्रपदप्राप्त्या तुष्टिः समुपजायते ।न तस्य स्वपदभ्रंशादुद्वेग उपजायते

In plain words

From the attaining of Indra's own station no delight arises for him; from the falling from his own station no agitation arises for him.