Bg. 4.7
संस्कृत श्लोक

यदा यदा हि धर्मस्य ग्लानिर्भवति भारत ।अभ्युत्थानमधर्मस्य तदात्मानं सृजाम्यहम् ॥ ७ ॥

Roman Transliteration

yadā yadā hi dharmasya glānir bhavati bhārata abhyutthānam adharmasya tadātmānaṁ sṛjāmy aham

Word-to-Word Meaning

yadā yadā — whenever and wherever; hi — certainly; dharmasya — of righteousness; glāniḥ — decline; bhavati — becomes; bhārata — O descendant of Bharata; abhyutthānam — predominance; adharmasya — of irreligion; tadā — at that time; ātmānam — self; sṛjāmi — manifest; aham — I

Translation
Whenever and wherever there is a decline in religious practice, O descendant of Bharata, and a predominant rise of irreligion — at that time I descend Myself.
Purport
This verse reveals the compassionate nature of the Supreme Personality of Godhead. Whenever the forces of irreligion threaten to overwhelm the world and the sincere devotees, the Lord personally appears in His original or an empowered form to reestablish dharma. This is not a mechanical event but a conscious, loving act of divine grace for the protection of the faithful.