'Wavers' in the Bible

‘Now if your fellow countryman becomes poor and his hand falters with you [that is, he has trouble repaying you for something], then you are to help and sustain him, [with courtesy and consideration] like [you would] a stranger or a temporary resident [without property], so that he may live among you.

The people of Heshbon and Elealeh cry out, their voices are heard as far away as Jahaz. For this reason Moab's soldiers shout in distress; their courage wavers.

But he must ask [for wisdom] in faith, without doubting [God’s willingness to help], for the one who doubts is like a billowing surge of the sea that is blown about and tossed by the wind.