'Weak' in the Bible

I [am] weak today even though anointed king, and these men, the sons of Zeruiah, [are] crueler than I [am]. May Yahweh pay them back for doing wickedness according to their [own] wickedness."

I will come upon him while he [is] weary and {weak}. I will startle him, and all of the people who [are] with him will flee. Then I will strike down the king [while] he [is] alone.