Jamieson, Fausset and Brown on Luke 14:12-14

12-14. call not thy friends--Jesus certainly did not mean us to dispense with the duties of ordinary fellowship, but, remitting these to their proper place, inculcates what is better [Bengel].

lest ... a recompense be given thee--a fear the world is not afflicted with [Bengel]. The meaning, however, is that no exercise of principle is involved in it, as selfishness itself will suffice to prompt to it (Mt 5:46, 47).