Legolas is capable of commanding good beasts with ease

‘Come, you shall sit behind me, friend Gimli,’ said Legolas. ‘Then all will be well, and you need neither borrow a horse nor be troubled by one.’

A great dark-grey horse was brought to Aragorn, and he mounted it. ‘Hasufel is his name,’ said Éomer. ‘May he bear you well and to better fortune than Gárulf, his late master!’

A smaller and lighter horse, but restive and fiery, was brought to Legolas. Arod was his name. But Legolas asked them to take off saddle and rein. ‘I need them not,’ he said, and leaped lightly up, and to their wonder Arod was tame and willing beneath him, moving here and there with but a spoken word: such was the Elvish way with all good beasts. Gimli was lifted up behind his friend, and he clung to him, not much more at ease than Sam Gamgee in a boat.

‘Farewell, and may you find what you seek!’ cried Éomer. ‘Return with what speed you may, and let our swords hereafter shine together!’

The Two Towers, Book Three, Chapter 2: The Riders of Rohan.