What is correct way of sitting when performing yajna? I have seen in Yajna, Brahmins seated for hours doing mantra chanting and don't even feel any pain or cramp when they get up. Do they follow certain sitting habit?
Lord Shiva says that, whether it's Puja, Japa or any other forms of worship, success is attained only if they are done while seated in a regular Yogic posture like Padmasana etc.
Here is the verse:
Padmaswastika virAdisvAsaneshupavishya cha |
JapArchanAdikam kuryAd anyathA nishphalam bhavet ||
One must perform Japa, archanA and other such spiritual activities only while being seated in one of the Yogic postures like Padma Asana, Swastika Asana, Vira Asana etc. Otherwise the acts do not bear any fruits.
KulArnava Tantram 15-35
Nityotsava, which is a manual for the Sri VidyA initiates and which elucidates the ParashurAma Kalpa Sutra chapterwise, also suggests that one must be seated in PadmAsana while doing PujA.
Now, PujA and Yajna are almost similar activities. So, this verse is applicable in the case of Yajna as well. And, apart from that the verse uses "Adikam" after archanA, so it automatically covers "any other similar activities". So, Yajna is covered in this verse.
However, we can't really see it being followed nowadays, whether in PujA or in Yajna. People usually sit in a posture called SukhAsana (a sitting posture that one is comfortable sitting in).