NT.filter - strkjv doubtful:

strkjv@Luke:12:29 @ And seek (5720) not ye what ye shall eat (5632), or what ye shall drink (5632), neither be ye of doubtful mind (5744).

strkjv@Romans:14:1 @ Him that is weak (5723) in the faith receive ye (5732), but not to doubtful disputations.