Matthew 6:19 comes here only, but Matthew 6:20, Matthew 6:21 have much in common with Luke 12:33, Luke 12:34. They are there in the middle of a long discourse (Luke 12:22-53), which immediately follows the parable of the rich fool, itself spoken on the occasion when a man wished his brother to divide the inheritance with him.
There seems no reason to believe that that discourse is at all necessarily in historical position, and that our verses belong originally to it and to its occasion rather than to the present place in Matthew.