New Testament book Acts of the Apostles at chapter 2 and verses 42, 44, and 45:

42 And they continued stedfastly in the apostles' doctrine and in fellowship [...] 44 And all that believed were together, and had all things in common; 45 And sold their possessions and goods, and parted them to all men, as every man had need. (King James Version)

The theme is reiterated in Acts 4:32-37:

32 And the multitude of them that believed were of one heart and of one soul: neither said any of them that ought of the things which he possessed was his own; but they had all things common. 33 And with great power gave the apostles witness of the resurrection of the Lord Jesus: and great grace was upon them all. 34 Neither was there any among them that lacked: for as many as were possessors of lands or houses sold them, and brought the prices of the things that were sold, 35 And laid them down at the apostles' feet: and distribution was made unto every man according as he had need. 36 And Joses, who by the apostles was surnamed Barnabas, (which is, being interpreted, The son of consolation,) a Levite, and of the country of Cyprus, 37 Having land, sold it, and brought the money, and laid it at the apostles' feet. (King James Version)

Sounds like capitalism is also incompatible with Christianity.