[Machine] Dhuhr and 'Ila' were considered forms of divorce during the pre-Islamic period, but Allah abolished them. Allah imposed a waiting period of four months for 'Ila' and prescribed expiation for Dhuhr.
كَانَ الظِّهَارُ وَالْإِيلَاءُ طَلَاقًا عَلَى عَهْدِ الْجَاهِلِيَّةِ فَوَقَّتَ اللهُ ﷻ فِي الْإِيلَاءِ أَرْبَعَةَ أَشْهُرٍ وَجَعَلَ فِي الظِّهَارِ الْكَفَّارَةَ