The table below presents presents two contradictory verses. Both verses speak about The water Abraham left for Hagar/Ishmael when he banished them The underlined words highlight the contradiction. One verse says And Abraham arose up early in the morning, and took bread and a bottle of water, and gave it unto Hagar, putting it on her shoulder, and the child, and sent her away; and she departed, and strayed in the wilderness of Beer-sheba. [Presumably he gave her enough water to reach the nearest civilization] while the other verse states And the water in the bottle was used up, and she cast the child under one of the shrubs. Which is it? Did Abraham give enough water for expulsion or was the water used up? Rashi simply resolves this using the 2 Aspects method: Abraham gave enough water for two healthy people to reach civilization. But the boy had a fever requiring a large consumption of water. Hence the water was used up quicker than expected.

Summary	Verse / Source	Text of verse / Source
Abraham banishes Hagar and her son and gives them [presumably enough] water	Gn21-14	And Abraham arose up early in the morning, and took bread and a bottle of water, and gave it unto Hagar, putting it on her shoulder, and the child, and sent her away; and she departed, and strayed in the wilderness of Beer-sheba. [Presumably he gave her enough water to reach the nearest civilization]
The water was used up	Gn21-15	And the water in the bottle was used up, and she cast the child under one of the shrubs.
Resolution:	2 Aspects	Abraham gave enough water for two healthy people to reach civilization. But the boy had a fever requiring large consumption of water. Hence the water wore out.