'Weak looking' in the Bible

He said to Amnon, “Why are you, the king’s son, so depressed morning after morning? Will you not tell me?” And Amnon said to him, “I am in love with Tamar, my [half-] brother Absalom’s sister.”

I chirp like a swallow or a crane;I moan like a dove.My eyes grow weak looking upward.Lord, I am oppressed; support me.