Permanent Damage to the Leg Resulting in Reduced Mobility Via a Stab Wound

I have been researching this for a while, but are there any stab wounds to the leg with a common sized dagger that would result in Permanent Damage to the Leg Resulting in Reduced Mobility? Currently, I have it that he gets stabbed and crippled because the dagger is cursed, but I want to see if I can have a more physical reason for it. The injury should preferably be to the front of the leg.

My MC doesn't die from this and I don't want the limb to become infected/gangrene or anything like that. I'm talk about hitting a major muscle, nerve or tendon. Any help with this would be appreciated.

The MC should be able to walk with a limp, so it shouldn't be serious enough to cause lasting damage. For the time at least, it needs to be permanent.

Cath said:

Thanks.

I suspect the most effective approach would be to cause an injury (snapped or torn tendon) that doesn't heal properly. The Achilles' Tendon could be very effective if fully severed and poorly healed.

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A tendon injury was something I am considering too, but could the same happen in the case of a muscle? Do stab ones to muscle ever heal right in any case? I've also considered hitting a nerve, but I don't want him to be fully disabled.