Mal 2:13 And this second thing you do. You cover the LORD’s altar with tears, with weeping and groaning because he no longer regards the offering or accepts it with favor from your hand.
Isa 1:15 When you spread out your hands, I will hide my eyes from you; even though you make many prayers, I will not listen; your hands are full of blood.
Check out this great description of “crocodile tears” that I found at Wikipedia:
Crocodile tears is a false, insincere display of emotion such as a hypocrite crying fake tears of grief. The phrase derives from an ancient belief that crocodiles shed tears while consuming their prey, and as such is present in many modern languages, especially in Europe where it was introduced through Latin.
You find examples throughout Scripture of unrepentant people crying and wailing to the Lord because He won’t bless them, hear their prayers, or accept their sacrifices. Needless to say, He is not taken in by this pathetic tactic. But deceitful people keep trying anyway, with all too much success.