From each according to his ability, to each according to his needs!

The complete paragraph containing Marx's statement of the creed in the 'Critique of the Gotha Program' is as follows:

In a higher phase of communist society, after the enslaving subordination of the individual to the division of labor, and therewith also the antithesis between mental and physical labor, has vanished; after labor has become not only a means of life but life's prime want; after the productive forces have also increased with the all-around development of the individual, and all the springs of co-operative wealth flow more abundantly—only then can the narrow horizon of bourgeois right be crossed in its entirety and society inscribe on its banners: From each according to his ability, to each according to his needs!

(from Wikipedia)

In the Bible, the book of Acts has two explicit passages depicting the very communistic nature of the early Christian community:

And all that believed were together, and had all things common; And sold their possessions and goods, and parted them to all men, as every man had need.
(Acts 2:44-45)

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, and laid them down at the apostles' feet: and distribution was made unto every man according as he had need. (Acts 4:34-35)