Can someone please tell me what episode did Athrun give Cagalli the ring? I think it is in Gundam SEED and not Gundam SEED Destiny right?

it's in Gundam Seed Destiny.. i think it's episode 8?? That's during the time when Athrun has to leave Cagalli and Orb and go back to Plants. So as a momentum, he gave Cagalli the ring as a symbol of his love. AsuCaga forever~!