But we will give ourselves continually to prayer, and to the ministry of the word.
But we will give ourselves continually - that is, more exclusively than had been possible while they had to attend to the daily distribution of provisions.
To prayer - that is, probably, not private prayer, but the 'public worship' in the assemblies of the Church.
And to the ministry of the word - the other great division of apostolic work. [Observe the contrast between diakonia (G1248) tou (G3588) logou (G3056) and diakonein (G1247) trapezais (G5132).]