Manavashrautasutra 6.2.2.6

6.2.2.6

prācyā tvā diśā sādayāmi \\ iti kḷptīr upadadhāti śirasi pakṣapucheṣu madhye pañcamīm /

With [the formulas beginning with] “I place you with the eastern quarter,” he places the kḷpti [bricks]: on the head, on the wings, on the tail, and the fifth in the middle.