Musannaf Ibn Abi Shaybah

Hazrat Ikrimah narrates regarding Hazrat Ibn Abbas (may Allah be pleased with them) that he disliked eating half-ripe dates alone. He also disliked that half-ripe and fully ripe dates be combined together. However, he saw no harm in combining raisins and dates, and he used to say, "Both of these are lawful things, whether they are together or separate." The narrator says that Hasan disliked combining dates and raisins.