Delta Ophiuchi is known as ‘Yed Prior’ (The Preceding Star of the Hand). The neighbouring star, epsilon Oph, is ‘Yed Posterior’ (Following Star of the Hand).
     Both stars are third-magnitude orange giants and represent the left hand of Ophiuchus, which is holding the serpent.

These two stars are easily found three and a half binocular fields to the southwest of alpha Oph, or just above the Scorpion's stinger (if you've studied Scorpius): binoculars.

You can also find them from Serpens. Following Serpens Caput down to its most southerly star, mu, we find the two Ophiuchi stars in the same field: binoculars.

East of delta and epsilon are the two finest Messier objects in Ophiuchus, M10 and M12.