Bhagavatapurana 1.9.29

1.9.29

dharmaṃ pravadatastasya sa kālaḥ pratyupasthitaḥ /
yo yoginaśchandamṛtyorvāñchitastūttarāyaṇaḥ //

29. To him (Bhishma) who was (thus) discoursing on Dharma, that time came which is specially desired by a Yogin, who can, however, depart from the body at his will, viz., the Uttarayana, the sun's course to the north of the equator.