Judges 1:21 says, And the children of Benjamin did not drive out the Jebusites that inhabited Jerusalem; but the Jebusites dwell with the children of Benjamin in Jerusalem unto this day.
Though they were told to drive out all the people who inhabited the land, the tribe of Benjamin did not do so either.  We really never can remove ourselves from all the worldly influences around us, but God expects us to remove them from our lives.  Verse twenty-two states, And the house of Joseph, they also went up against Bethel: and the LORD was with them.  The house of Joseph went up against the people of Bethel.  Verse twenty-three adds, And the house of Joseph sent to descry Bethel. (Now the name of the city before was Luz.)  We are told that the name of Bethel had once been Luz, but not when nor why it was changed.  Verse twenty-four declares, And the spies saw a man come forth out of the city, and they said unto him, Shew us, we pray thee, the entrance into the city, and we will shew thee mercy  Spies from the tribe of Joseph encountered a man coming out of the city and offered him mercy if he would show them the entrance to the city.  Verse twenty-five adds, And when he shewed them the entrance into the city, they smote the city with the edge of the sword; but they let go the man and all his family. The tribe of Joseph defeated the city and had mercy on the man and his family.  We have to work with the people of the world quite often, and if we make agreements with them, as long as the agreements are not contrary to God's word, then we need to honor them.  If they are not in accordance with God's word, then we don't need to make them to begin with.  Verse twenty-six continues, And the man went into the land of the Hittites, and built a city, and called the name thereof Luz: which is the name thereof unto this day.  The man did not stay in the land, but went to the land of the Hittites and built a city called Luz.  Not everyone that we show the mercy of God to is going to want to be a part of His kingdom, but that does not exempt us from sharing the gospel with them.  Verse twenty=seven says. Neither did Manasseh drive out the inhabitants of Bethshean and her towns, nor Taanach and her towns, nor the inhabitants of Dor and her towns, nor the inhabitants of Ibleam and her towns, nor the inhabitants of Megiddo and her towns: but the Canaanites would dwell in that land.  The tribe of Manasseh failed to drive out several people from their land, which God had told them to do.  When we fail to drive all the worldly influences out of our lives, it is going to cause us problems later on.  Verse twenty-eight declares,  And it came to pass, when Israel was strong, that they put the Canaanites to tribute, and did not utterly drive them out.  Then verse twenty-nine adds, Neither did Ephraim drive out the Canaanites that dwelt in Gezer; but the Canaanites dwelt in Gezer among them.  Another of the tribes of Israel failed to drive out the people of the land, but instead attempted to profit from them being there.  We need to be careful that we don't allow the things of this world to remain in our lives simply because they are profitable.  Verse thirty declares, Neither did Zebulun drive out the inhabitants of Kitron, nor the inhabitants of Nahalol; but the Canaanites dwelt among them, and became tributaries.  Then verse thirty-one adds, Neither did Asher drive out the inhabitants of Accho, nor the inhabitants of Zidon, nor of Ahlab, nor of Achzib, nor of Helbah, nor of Aphik, nor of Rehob:  Verse thirty-two continues, But the Asherites dwelt among the Canaanites, the inhabitants of the land: for they did not drive them out.  The tribes of Zebulon and Asher also failed to drive out all the inhabitants of the land.  Verse thirty-three says, Neither did Naphtali drive out the inhabitants of Bethshemesh, nor the inhabitants of Bethanath; but he dwelt among the Canaanites, the inhabitants of the land: nevertheless the inhabitants of Bethshemesh and of Bethanath became tributaries unto them.  The tribe of Nephtali did not drive all the people out, but they did make some of them pay tribute to them.  In none of these cases was this what God had told them to do.  We cannot compromise what God tells us to do and still be successful in our spiritual life, even if doing so might be the easiest or most profitable thing to do.  Verse thirty-four declares, And the Amorites forced the children of Dan into the mountain: for they would not suffer them to come down to the valley:  Verse thirty-five adds, But the Amorites would dwell in mount Heres in Aijalon, and in Shaalbim: yet the hand of the house of Joseph prevailed, so that they became tributaries.  The Amorites prevailed against the tribe of Dan, forcing them up into the mountain, but the tribe of Joseph prevailed against the Amorites and forced the Amorites in their land to pay them tribute.  Verse thirty-six concludes, And the coast of the Amorites was from the going up to Akrabbim, from the rock, and upward.  God had given specific instructions that the people of Israel were to drive out all the people in the land, but over and over they failed to do so.  God had said He would be with them to give them the victory, but they often failed to claim it.  God did not change or fail them, so the failure had to be a lack of faith or concern on the part of the people.  When we fail to carry out God's calling that He gives us today as followers of Christ, then it must be due to a lack of faith or concern on our part.  God will never fail us.