Bhagavad Gita Chapter 4 Verse 7
भगवद् गीता अध्याय 4 श्लोक 7

यदा यदा हि धर्मस्य ग्लानिर्भवति भारत।
अभ्युत्थानमधर्मस्य तदाऽऽत्मानं सृजाम्यहम्।।4.7।।



English Translation - Swami Gambirananda
4.7 O scion of the Bharata dynasty, whenever there is a decline one virtue and increase of vice, then do I manifest Myself.


English Translation - Swami Sivananda
4.7 Whenever there is decline of righteousness, O Arjuna, and rise of unrighteousness, then I manifest Myself.


English Translation - Dr. S. Sankaranarayan
4.7. For, whenever there is a decay of righteousness and the rise of unrighteousness, then, O descendant  of Bharata,  I send forth (or create) that is which the Self is unimportant.


English Commentary  - Swami Sivananda
4.7 यदा यदा whenever? हि surely? धर्मस्य of righteousness? ग्लानिः decline? भवति is? भारत O Bharata? अभ्युत्थानम् rise? अधर्मस्य of unrighteousness? तदा then? आत्मानम् Myself? सृजामि manifest? अहम् I.Commentary Dharma is that which sustains and holds together. There is no proper eivalen for this term in the English language. That which helps a man to attain to Moksha or salvation is Dharma. That which makes a man irreligious or unrighteous is Adharma. That which elevates a man and helps him reach the goal of life and attain knowledge is Dharma that which drags him and hurls him down in the abyss of worldliness and ignorance is Adharma.


English Translation of Sanskrit Commentary By Sri Shankaracharya's
4.7 O scion of the Bharata dynasty, yada yada hi, whenever; bhavati, there is; a glanih, decline, decrease; dharmasya, of virtue consisting of the duties of castes and stages of life of living beings, which are the means to achieving properity and Liberation; and abhyutthanam, increase, rise; adharmasya, of vice; tada, then; do aham, I; srjami, manifest; atmanam, Myself, through Maya.
Why?


English Translation of Commentary  - Dr. S. Sankaranarayan
4.7 See Comment under 4.9


English Translation of Ramanuja's Sanskrit Commentary
4.7 There is no restriction as to the time of My birth; whenever the Dharma taught by the Vedas that must be observed according to the arrangements of the four stations and the four stages of life declines, and Adharma, its opposite, increases, then I Myself, by My own will and in the manner stated, incarnate Myself.

Sri Krsna gives the purpose of His birth.


Commentary  - Chakravarthi Ji
When do I appear?” This verse answers.
I appear when I cannot tolerate both the destruction (glani) of dharma and the increase (abhyutthanam) of adharma, in order to reverse   the   situation.   I   create   my   body   (atmanam). Madhusudana Sarasvati says, “I show that body which exists eternally, as if it were created by my energy.”


Rudra Vaishnava Sampradaya - Commentary

Anticipating the question of exactly when is it that He  manifests  Himself,
Lord Krishna declares unequivocally  beginning  with  the  words  yada  yada
meaning whenever and wherever. Whenever there is a decline in righteous  and
wherever there is a predominance of unrighteousness.


Brahma Vaishnava Sampradaya - Commentary
There is no commentary for this verse.


Shri Vaishnava Sampradaya - Commentary


No fixed time schedule has  been  mandated  for  Lord  Krishna  to  manifest
Himself in His avatar forms  or  authorised  incarnations  but  he  declares
beginning with yada yada which means that: whenever or  wherever  dharma  or
righteousness as ordained by the Vedic scriptures under  varnasrama  or  the
four  stages  and  position   in   Vedic   culture   become   degraded   and
unrighteousness increases and becomes dominant at that time Lord Krishna  or
any of His authorised incarnations descends and becomes manifest. It  should
be noted that all the names of His avatars or incarnations are  recorded  in
the Bhagavat Purana and othe Vedic scriptures  with  additional  details  so
that it can be proven when His divine incarnation has manifested.


Kumara Vaishnava Sampradaya - Commentary
No fixed time schedule has  been  mandated  for  Lord  Krishna  to  manifest
Himself in His avatar forms  or  authorised  incarnations  but  he  declares
beginning with yada yada which means that: whenever or  wherever  dharma  or
righteousness as ordained by the Vedic scriptures under  varnasrama  or  the
four  stages  and  position   in   Vedic   culture   become   degraded   and
unrighteousness increases and becomes dominant at that time Lord Krishna  or
any of His authorised incarnations descends and becomes manifest. It  should
be noted that all the names of His avatars or incarnations are  recorded  in
the Bhagavat Purana and othe Vedic scriptures  with  additional  details  so
that it can be proven when His divine incarnation has manifested.


Transliteration Bhagavad Gita 4.7Yadaa yadaa hi dharmasya glaanir bhavati bhaarata;
Abhyutthaanam adharmasya tadaatmaanam srijaamyaham.


Word Meanings Bhagavad Gita 4.7yadā yadā—whenever; hi—certainly; dharmasya—of righteousness; glāniḥ—decline; bhavati—is; bhārata—Arjun, descendant of Bharat; abhyutthānam—increase; adharmasya—of unrighteousness; tadā—at that time; ātmānam—self; sṛijāmi—manifest; aham—I