Shatapatha Brahmana 10.4.2.16

10.4.2.16

viṃśatimātmano'kuruta ṣaṭtriṃśadiṣṭakāntsa naiva vyāpnonnaikaviṃśatidhā vyabhavanna dvāviṃśatidhā na trayoviṃśatidhā

He made himself twenty bodies of thirty-six bricks each: he did not succeed. He did not develop either twenty-one-fold, or twenty-two-fold, or twenty-three-fold.