Śatapatha Brāhmaṇa ("of a hundred paths") 3.2.4.17

3.2.4.17

sā naḥ suprācī supratīcyedhīti | suprācī na edhi somaṃ no 'cehītyevaitadāha supratīcī ta edhi somena naḥ saha punarehītyevaitadāha tasmādāha sā naḥ suprācī supratīcyedhīti

'Be thou for us successful (in going) forward and successful (in coming) back!' when he says, 'Be thou for us successful (in going) forward,' he means to say, 'Go to (fetch) Soma for us!' and when he says, 'Be thou successful (in coming) back,' he means to say, 'Come back to us with Soma!' This is why he says, 'Be thou for us successful (in going) forward and successful (in coming) back!'