Seeing oneself bound in leg-irons indicates stability in the religion.
Based on: Muhammad ibn Seereen said: “Abu Huraira hated to see neck irons (metallic neck collars) in a dream, and people generally liked to see leg-irons. Leg-irons were said to symbolise one’s constant and form adherence to religion” [Sahih of Bukhari, vol 9 p 118-9 no 144]
Imam an Nawawee noted that the reason shakles (qayd) on the feet were liked was because they indicate avoiding sin and evil (i.e. the feet are prevented from taking the body to corruption). On the other hand, shackles (ghull) on theneck is one of the characteristics of those in Hell (Quran 13:5, 34:33, 36:8 and 40:71). [Sharh an
Nawaweevol 8 p 28]