The S-IVB third stage injected the craft into Earth orbit and remained attached to perform the TLI burn that would put the spacecraft on a trajectory to the Moon.
ðɪ ˈɛsˌaɪvˌiːbˈiː θˈɜːd stˈeɪdʒ ɪndʒˈɛktᵻd ðə kɹˈæft ˌɪntʊ ˈɜːθ ˈɔːɹbɪt ænd ɹᵻmˈeɪnd ɐtˈætʃt tə pɚfˈɔːɹm ðə tˌiːˌɛlˈaɪ bˈɜːn ðæt wʊd pˌʊt ðə spˈeɪskɹæft ˌɔn ɐ tɹədʒˈɛktɚɹi tə ðə mˈuːn.