I recognized an error in BDAG under ἀρνέομαι, ④ as in the following:
ἀ. τὴν δύναμιν εὐσεβείας deny the function of piety (by contradictory conduct) 3:5.
The reference 3:5 should be corrected to 2 Ti 3:5. As the location indicated in the reference would be Lk 3:5 by the earlier reference to a Luke passage. Apparently, the Luke reference does not have the quoted text.