One verse

Srimad Bhagavatam 1.9.29

1.9.29

धर्मं प्रवदतस्तस्य स काल: प्रत्युपस्थित: । यो योगिनश्छन्दमृत्योर्वाञ्छितस्तूत्तरायण: ॥ २९ ॥

dharmam pravadatas tasya sa kalah pratyupasthitah yo yoginas chanda-mrtyor vanchitas tuttarayanah

dharmam
occupational duties
pravadatah
while describing
tasya
his
sah
that
kalah
time
pratyupasthitah
exactly appeared
yah
that is
yoginah
for the mystics
chanda-mrtyoh
of one who dies according to one’s own selection of time
vanchitah
is desired by
tu
but
uttarayanah
the period when the sun runs on the northern horizon.

While Bhismadeva was describing occupational duties, the sun’s course ran into the northern hemisphere. This period is desired by mystics who die at their will.