Agniveshyagrihyasutra 3.6.2.7

3.6.2.7

atha yadyāhitāgniranyatra preyādādīpyamānairāhūyamānairvasīran yāvadasya śarīramagnibhiḥ samāgamayeran \

Now, if one who has set up the sacred fires should die elsewhere, they should dwell while [the fires] are kept burning and invoked until they bring his body together with the fires.