You can harmlessly absorbs a weapon you are touching (even a poisoned one) into your arm, as long as it is not ok another creatures possession. The weapon must be a light weapon for you at the the time you cast the spell. The absorbed weapon can not be felt under the skins and doesn’t restrict your range of motion in any way. An absorbed weapon cannot be detected even with a careful search.

When you touch the spot as a bonus action, or when the spell’s duration expires, the weapon appears in your hand and the spell ends. If you attack with the weapon on the same round that you retrieve it from this spell you have advantage the first attack you make against a target.  

At Higher Levels. When you cast this spell using a spell slot of 3rd level or higher, the duration increases by one hour for every slot above 3nd.