Matius 5:37

5:37 Let your word be ‘Yes, yes’ or ‘No, no.’ More than this is from the evil one. ¹ 

Matius 5:46

5:46 For if you love those who love you, what reward do you have? Even the tax collectors ²  do the same, don’t they?

[5:37]  ¹ tn The term πονηροῦ (ponhrou) may be understood as specific and personified, referring to the devil, or possibly as a general reference to evil. It is most likely personified, however, since it is articular (τοῦ πονηροῦ, tou ponhrou). Cf. also “the evildoer” in v. 39, which is the same construction.

[5:46]  ² sn The tax collectors would bid to collect taxes for the Roman government and then add a surcharge, which they kept. Since tax collectors worked for Rome, they were viewed as traitors to their own people and were not well liked.