Vocation

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late Middle English: from Old French, or from Latin vocatio(n- ), from vocare ‘to call’.

wiktionary

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From Middle English vocacioun, from Old French vocation, from Latin vocātiō.

etymonline

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vocation (n.)

early 15c., "spiritual calling," from Old French vocacion "call, consecration; calling, profession" (13c.) or directly from Latin vocationem (nominative vocatio), literally "a calling, a being called" from vocatus "called," past participle of vocare "to call," which is related to vox (genitive vocis) "voice" (from PIE root *wekw- "to speak"). Sense of "one's occupation or profession" is first attested 1550s.