The Panchagni Vidya is an Upasana described in Chhandogya Upanishad chapter 5.3. According to the Sri Vaishnava commentatory Ranga Ramanuja, the purpose of this Upasana is:
To introduce the "Panchagni Vidya" which is related to the meditation upon the true nature of the Jivatman freed from the contact of matter, and for causing detachment from ...
Purvanha or forenoon is the best time for doing rites related to Devas (deities). Where as afternoon (Aparanha) is best suited for performing rites related to deceased ancestors.
The following verses from Manu Smriti have the words Purvanha (translated as morning) and Aparanha (translated as afternoon) in them.
3.255. The afternoon, Kusa grass, the due ...
Swami Sivananda in "All About Hinduism" Page 115-119 writes
Idol or Murthy (Vigraha), Sun, Fire, Water, Ganga, Saligram, Linga are
all symbols or Prateekas of God which help the aspirants to attain
one-pointedness of mind and purity of heart. A symbol is absolutely
indispensable for fixing the mind. For a Bhakta or a sage, there is
no such thing ...
It is talking about householders and the necessity of doing the Pancha Mahayajnas daily. For a householder it's stated that there are five slaughter houses in their home itself.
Manu 3.68. A householder has five slaughter-houses (as it were, viz.)
the hearth, the grinding-stone, the broom, the pestle and mortar, the
water-vessel, by using which he is bound (...
In Bhavishya Purana a lot is found on Surya worship as the text considers Surya as the supreme deity.
In it, we find Shri Krishna advising son Samba on how to correctly worship Surya Narayana.
As per that, the mantra to be used while pouring the Arghya is a mantra called as the Shakshatkara mantra of sun.
Quoting from the book "Essence of Bhavishya ...
Yes, there are a few instances in both Taittirīya Saṃhitā and Brāhmaṇa (attached to Kṛṣṇa Yajurveda) and the Śatapatha Brāhmaṇa (Śukla Yajurveda) where it's said śūdras are not fit to conduct yajñas and that brāhmaṇas and kṣatriyas are superior to other varṇas (vaiśyas and śūdras).
Taittirīya Saṃhitā (Kṛṣṇa Yajurveda) on śūdras:
Is sannyasa a Vedic way of life? Is it recommended by the Vedas, the ten authentic Upanishads or Grhyasutras?
The idea that sannyasashrama is not sanctioned by the Vedas is an old idea held even by famous Rishis like Gautama and Bodhayana:
Gautama dharma sutras 3.36:
There is, however, only one order of life [Ashrama] according to the venerable teacher, ...
Note: This is not an answer to the question, but rather an explanation as to why there can ever be no such authorities to standardize any form of traditions or customs, based on a broader view of ever-changing nature of everything.
From a broader perspective, taking into account the evolution of early Indic religions to the present forms of Hinduism and ...
Swami Sivananda in his "All about Hinduism" writes
There are five great daily sacrifices that are to be performed by
every householder. They are: (i) Brahma Yajna, called also Veda Yajna,
sacrifice to Brahman or the Vedas or the sages; (ii) Deva Yajna,
sacrifice to the celestials; (iii) Pitri Yajna, sacrifice to the
manes; (iv) Bhuta Yajna, ...
Amavasya Tharpanam is also called darsha-shrArdha (darsha = new moon; shrArdha = worship of ancestors).
All shrArdhas are only to be performed in the aparAhna.
There are two interpretations to aparAhna:
The fourth part of a five-fold equally split day between sunrise and sunset. (Taittiriya Brahmana 1.5.3)
The second half of a day between sunrise and sunset....
காணாமல் , கோணாமல் , கண்டு
Kaanamal, Konaamal, Kandu
Above is a Tamil dictum for Tri-kala Sandhya-Vandana that explains when Arghya must be given.
Pratah - Kaanamal (morning - unseen i.e. before sunrise at 6)
Madhyan - Konaamal (afternoon - un-angled i.e. right above head at 12)
Sayam - Kandu (evening - seen i.e. before sunset at 6)
Symbolic gestures are ...
Sandhya is a Nitya Karma for the Dvijas (Brahmins, Ksatriyas and Vaishyas). And, one remains impure unless the initiated Dvija performs the Nitya Karma first.
The Nitya Karma Puja Prakash book quotes a verse from Daksha Smriti in this regard:
SandhyAhino-asuchir-nityamanarhah sarva-karmasu | Yadantat kurute
karma na tasya phala-bhAga-bhavet ||
If Brahmins, ...
I am a practicing Brahmin and this is how I have been giving tarpan to Surya every morning since I read this portion of Devi Bhagavatam by Veda Vyasa some years ago.
In Eleventh book of Devi Bhagavatam Chapter 24, nArAyana tells nArada that if one offers Tarpanam with one palmful of water, repeating the mantra “Sûryam Tarpayâmi namah”, the pending evils are ...
As a Brahmana (Brahmin) what else should I do beside praying to God
Surya in the morning?
The most important activity that, not only Brahmins but everyone, can do in the morning to worship Surya is to do Surya Namaskara. There are several variants with minor differences in the steps, but each of them has 12 steps.
Each of the 12 steps has a namo-mantra of ...
Rig Veda IV.54.6 says as follows:
ये ते॒ त्रिरह॑न् त्सवितः स॒वासो॑ दि॒वेदि॑वे॒ सौभ॑गमासु॒वन्ति॑ ।
इन्द्रो॒ द्यावा॑पृथि॒वी सिन्धु॑र॒द्भिरा॑दि॒त्यैर्नो॒ अदि॑ति॒: शर्म॑
O Savitar, as three times a day your impulsions impel good fortune day
after day, Indra, Heaven and Earth, the Sindhu with her waters, Aditi
with the Ādityas, will extend shelter to ...
The oldest extant Vedic scripture to mandate Sandhyāvandana is probably the Āśvalāyana Gṛhyasūtra (attached to Ṛgveda):
Adhyāya III, Kaṇḍikā 7
If the sun sets while he is sleeping without being sick, he should spend the rest of the night keeping silence, without sitting down, and should worship the sun (when it rises) with the five (verses), 'The ...