Contradiction with John 14:13
Genesis 26:25 shows building an altar before asking for anything, while John 14:13 suggests asking in Jesus' name for direct results.
John 14:13: And whatsoever ye shall ask in my name, that will I do, that the Father may be glorified in the Son.
Contradiction with Matthew 6:5-6
Genesis 26:25 involves public display, building an altar and pitching tents, whereas Matthew 6:5-6 emphasizes praying in private.
Matthew 6:5-6: And when thou prayest, thou shalt not be as the hypocrites [are]: for they love to pray standing in the synagogues and in the corners of the streets, that they may be seen of men. Verily I say unto you, They have their reward.
Contradiction with Hebrews 10:11-12
Genesis 26:25 describes continual offerings, while Hebrews 10:11-12 speaks of a single sufficient sacrifice by Christ.
Hebrews 10:11-12: And every priest standeth daily ministering and offering oftentimes the same sacrifices, which can never take away sins:
Contradiction with Acts 7:48
Genesis 26:25 involves physical altars and dwelling, while Acts 7:48 asserts God does not dwell in buildings made by hands.
Acts 7:48: Howbeit the most High dwelleth not in temples made with hands; as saith the prophet,
Contradiction with Jeremiah 7:22-23
Genesis 26:25 depicts sacrifices at an altar, whereas Jeremiah 7:22-23 suggests God did not command sacrifices at the time of the Exodus.
Jeremiah 7:22-23: For I spake not unto your fathers, nor commanded them in the day that I brought them out of the land of Egypt, concerning burnt offerings or sacrifices: [concerning: Heb. concerning the matter of]