Which Herb is This?

Last week I bought a herb plant which I don't know its species.

Unidentified herb plant.

Here's a close up shot of its leaves:

The Ah Pek who sold me the herb said it's usually eaten with chicken rice. But I don't remember eating this herb together with any chicken rice ever - whether it's Ipoh Chicken Rice, Hainanese Chicken Rice or Whatever Chicken Rice.

Do you know the species of this herb? Please leave a comment if you know the answer.

Thanks!