Analysis of information sources in references of the Wikipedia article "Yajna" in English language version.
The two rake the holy vow in the presence of Agni ... In the first four rounds, the bride leads and the groom follows, and in the final three, the groom leads and the bride follows. While walking around the fire, the bride places her right palm on the groom's right palm and the bride's brother pours some unhusked rice or barley into their hands and they offer it to the fire ...
The bride leads in all the first six pheras but follows the bridegroom on the seventh