In Genesis 29:17, this signifies that the affections of external truth have feeble and wavering understanding. (Arcana Coelestia 3820)

In Numbers 13:18, it signifies being without supporting truths. (Arcana Coelestia 6344)

In Psalm 6:2, weakness occurs in a prayer of the Lord to the Father when He was in the last state of temptation, which is despair. (The Inner Meaning of the Prophets and Psalms 256.)

In Psalm 109:24, it signifies a lack of nourishing goods and truths. (Arcana Coelestia 9050[7])