Boasting is generall
Boasting is generally a blameworthy attribute that a God-fearing person should not exhibit in his character or speech.
Imam 'Ali b. Abi Talib (a) has several short sayings addressing this behaviour of pride and boastfulness.
1. What reason has a human being to be proud when his beginning is a drop of semen and his end is a carcass; neither can he sustain himself nor can he repel his [own] death!