Atharvaveda 12.2.24

12.2.24

ā́ rohatā́yur jarásaṃ vr̥ṇānā́ anupūrváṃ yátamānā yáti sthá |
tā́n vas tváṣṭā sujánimā sajóṣāḥ sárvam ā́yur nayatu jī́vanāya ||24||

Mount, choosing old age for life-time, pressing on, one after another, as many as ye be; you here let Tvashṭar, him of good births, in accord [with you], lead on to living your whole life-time.