Raistlin tires quickly, but doesn’t want help

“Look at Raistlin …” Their eyes went to the mage, who was shuffling through the dry leaves, keeping always in the shadows. He leaned heavily upon his staff. Occasionally, a dry cough racked his frail body.
Caramon’s face darkened. “Tanis is right,” he said softly. “Raist can’t take much more of this. I must go to him.” Leaving the knight and the half-elf, he hurried forward to catch up with the robed, bent figure of his twin.
“Let me help you, Raist,” they heard Caramon whisper.
Raistlin shook his hooded head and flinched away from his brother’s touch. Caramon shrugged and dropped his arm. But the big warrior stayed close to his frail brother, ready to help him if necessary.

Excerpt From Dragons of Autumn Twilight, pg 93
Margaret Weis & Tracy Hickman