Chapter II sloka 68

tSma*Sy mhabahae ing&hItain svRz>,
#iNÔya[IiNÔyaweR_yStSy à}a àitióta.

tasm˜dyasya mah˜b˜ho 
nig®heet˜ni sarvaþa× |
indriy˜õeendriy˜rthebhyas
tasya prajñ˜ pratish÷hit˜ ( 2|68)||

Therefore, O mighty-armed Arjuna, his knowledge is steady whose senses are completely restrained from sense-objects.