The romantic nature of their relationship was first described by Callimachus of Alexandria, who wrote that Apollo was "fired with love" for Admetus.
ðə ɹoʊmˈæntɪk nˈeɪtʃɚɹ ʌv ðɛɹ ɹᵻlˈeɪʃənʃˌɪp wʌz fˈɜːst dᵻskɹˈaɪbd baɪ kˈælɪmˌætʃəs ʌv ˌælɪɡzˈændɹiə, hˌuː ɹˈoʊt ðæt ɐpˈɑːloʊ wʌz "fˈaɪɚd wɪð lˈʌv" fɔːɹ ɐdmˈɛɾəs.