Pāṇigrahaṇa — taking the hand
The groom takes the bride's right hand in his, reciting a verse from the Ṛgveda's wedding hymn that begins “gṛbhṇāmi te saubhagatvāya hastam” — “I take your hand for good fortune, that you may grow old with me as your husband.”
In Sanskrit, pāṇigrahaṇa (“taking the hand”) became another word for marriage itself.
Ṛgveda 10.85