SB 8.16.43
krtva sirasi tac-chesam
devam udvasayet tatah
dvy-avaran bhojayed vipran
payasena yathocitam
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
After touching to one’s head all the flowers and water offered to the Deity, one should throw them into a sacred place. Then one should feed at least two brahmanas with sweet rice.