The lord of the 5th house in the 5th house of the horoscope

BPHS: If the ruler of the 5th bhava is placed in the 5th bhava and is in conjunction with (or under the aspect of) a benefic graha, the native will be blessed with sons (children). But he will have no offspring, he will be virtuous and respected by his friends, in the case where the ruler of the 5th bhava is placed in the 5th bhava together with a malefic graha. 

The lord of the 5th house in the 5th house.  Good aims, anxieties from his own child, a good intellect, but an unstable mind; this person will be a senior priest or an adviser, he has certain opportunities in the field of accounting, along the line of entertainment and the investment of capital in industry. “Vedic Astrology”. Tom Hopke

A strong intellect, an inclination towards science, the respect of those around, anxieties from children, piety. Indubala Devi Dasi. “Jyotish, or Vedic Astrology”

The planet is in svakshetra (its own house). Happiness from children, prosperous children, brilliant mental abilities, religiousness, the performance of good deeds, a love of sport, successful investments, an enthusiasm for speculation, happy love affairs, a knowledge of prayers or of the sacred scriptures, absolute honesty and dignity; the person may head a religious or spiritual organisation, a very strong purva punya, dharma. An interest in politics; he may be a manager, help from wealthy people or philanthropists. James Braha, “Ancient Hindu Astrology for the Modern Western Astrologer”

Nobility, the love of friends; if in conjunction with a favourable planet — the birth of sons. Shri G.S. Agarwal

In its own house the planet feels very confident. All the aspects of the 5th house become vivid and significant in the native’s life. Creative self-expression is a natural process for the person; it comes without effort. Kapiel Raaj