Jews and Christians have not observed Leviticus’s instructions for animal offerings since the 1st century AD, following the destruction of the Second Temple in Jerusalem in 70 AD. As there was no longer a Temple at which to offer animal sacrifices, Judaism pivoted towards prayer and the study of the Torah, eventually giving rise to Rabbinic Judaism.- Book of Leviticus (Wikipedia)
The Book of Leviticus (/lɪˈvɪtɪkəs/, from Ancient Greek: Λευιτικόν, Leuïtikón; Biblical Hebrew: וַיִּקְרָא, Wayyīqrāʾ, ‘And He called’; Latin: Liber Leviticus) is the third book of the Torah (the Pentateuch) and of the Old Testament, also known as the Third Book of Moses. Many hypotheses presented by scholars as to its origins agree that it developed over a long period of time, reaching its present form during the Persian Period, from 538 to 332 BC, although this is disputed.