Shatapatha Brahmana 1.9.1.27

1.9.1.27

gātuṃ yajñāya gātuṃ yajñapataya iti | gātuṃ hyeṣa yajñāyecati gātuṃ yajñapataye yo yajñasya saṃsthāṃ daivī svastirastu naḥ svastirmānuṣebhya iti svasti no devatrāstu svasti manuṣyatretyevaitadāhordhvaṃ jigātu bheṣajamityūrdhvaṃ no 'yaṃ yajño devalokaṃ jayatvityevaitadāha

'Success to the sacrifice, success to the lord of sacrifice!' he who wishes for the consummation of the sacrifice, thereby wishes success to the sacrifice and success to the lord of sacrifice.--'Bliss (svasti) to us, bliss to men!' he thereby says, 'May we enjoy bliss among the gods, bliss among men!'--'May the means of salvation ascend on high!' he thereby says, 'May this sacrifice secure for us the world of the gods!'