[2] The missionaries David, Eskil, and Botvid preached chiefly in Södermanland and Västmanland, in the area of Lake Mälaren.

[3][4] David is associated with Munktorp, a village situated in Köping Municipality, in Västmanland County.

Munktorp Church is in Västerås diocese, northeast of Köping, Sweden.

According to the Västerås breviary, David came to evangelize in Sweden in order to become a martyr.

It further says that David "wandered among villages and towns, preaching the word of God and baptizing the converted, kept nightly prayer vigils, committing to God with tears and sighs his plentiful offspring, which he had thus born in the Lord".