Bhagavad Gita Chapter 4 Verse 7

Gita 4.7

यदा, यदा, हि, धर्मस्य, ग्लानिः, भवति, भारत,
अभ्युत्थानम्, अधर्मस्य, तदा, आत्मानम्, सृजामि, अहम्।।7।।

Gita 4.7

Yadaa, yadaa, hi, dharmasya, glaaniH, bhavti, bharat,
Abhyutthaanam’, adharmasya, tadaa, aatmaanam’, srjaami, aham’ ||7||

Translation: (Bharat) O Bharat! (yadaa, yadaa) whenever (dharmasya) of righteousness (glaaniH) decline and (adharmasya) unrighteousness (abhyutthaanam’) rise (bhavti) occurs (tadaa) then-then (hi) only (aham’) I (aatmaanam’) my partial incarnation (srjaami) create. (7)

Gita 4.7: O Bharat! Whenever there is a decline of righteousness and rise of unrighteousness, then only I create my partial incarnation.