Vaishnava Dharmashastra 54.16

54.16

parivittiḥ parivettā ca yayā ca parividyate dātā yājakaś ca cāndrāyaṇaṃ kuryāt ||

An unmarried elder brother whose younger brother is married, a younger brother married before the elder, an unmarried elder sister whose younger sister is married, the relative who gives such a damsel in marriage, and the priest who officiates at such a marriage, must perform the Kândrâyana.
17, He who sells living beings, land, religious merit (obtained by a sacrifice or otherwise), or Soma, must perform the Taptakrikkhra.