Thread by @blog_supplement

The yajurvedin-s of all schools use the incantations beginning with agnAviShNU sajoShasa... known as the chamaka-prashna in their vasordhAra. The atharvaveda has an internal reference to what is taken as the vasordhAra:

vasor yA dhArA madhunA prapInA
ghR^itena mishrA amR^itasya nAbhayaH |
The atharvan vasordhAra uses a wholly different set of incantations. It begins with brahma jaj~nAnam prathamam...
Then it has the incantation:
asmin vasu vasavo dhArayantv
indraH pUShA varuNo mitro agniH |

Here again, the vasavo dhArayantu is taken to signify the vasordhAra. In the middle comes the above incantation vasor yA dhAra...
It also features AV incantation: ud utsaM shatadhAraM sahasradhAram akShitam | and related ones. However, the most striking feature of AV vasordhAra

is the invocation of 7 goddess in the middle of the rite: shrI, lakshmI, dhR^iti, svadhA, svAhA, praj~nA and sarasvatI. These are invoked at the top of the tube after the incantion tilavatsA Urjam asmai duhAnA vishvAhA santv anapasphurantIH| ... upAsate pitaraH svadhAbhiH ||

As some have asked about some of these goddesses a bit of elaboration. shrI & lakShmI are homotypes, the old wealth goddess, eventually identified with viShNu-patnI. praj~nA & sarasvatI are similarly homotypes of the old transfunctional goddess in her knowledge aspect. svadhA&

svAhA are the wives of agni & personification of the ritual call for the gods & ancestors. dhR^iti is mentioned in the taittirIya-shruti as the mistress of the R^ita. Oblations to her a key part of the ashvamedha ritual when the horse is turned to come back. Keeping with the old

association dhR^iti is called the wife of dharma in the bhArata and mAdrI is mentioned as her incarnation.

It may also be noted that the invocation of 7 goddess parallels the 7 mothers -- the 7 goddesses of the RV & AV and also parallelly in later tradition; e.g. AV-vul incantation:
ye pR^inanti pra cha yaChanti sarvadA te duhrate dakShiNAM saptamAtaram ||