'Weariness' in the Bible

And David, with four hundred men, went on: but two hundred of them were overcome with weariness, and not able to go across the stream.

And David came to the two hundred men, who because of weariness had not gone with him, but were waiting at the stream Besor: and they went out, meeting David and the people who were with him; and when they came near them, they said, How are you?