Plutarch
Later, as they relate, Osiris came to Horus from the other world and exercised and trained him for the battle. After a time Osiris asked Horus what he held to be the most noble of all things. When Horus replied, “To avenge one’s father and mother for evil done to them,” Osiris then asked him what animal he considered the most useful for them who go forth to battle; and when Horus said, “A horse,” Osiris was surprised and raised the question why it was that he had not rather said a lion than a horse. Horus answered that a lion was a useful thing for a man in need of assistance, but that a horse served best for cutting off the flight of an enemy and annihilating him. When Osiris heard this he was much pleased, since he felt that Horus had now an adequate preparation. It is said that, as many were continually transferring their allegiance to Horus, Typhon’s concubine, Thueris, also came over to him; and a serpent which pursued her was cut to pieces by Horus’s men, and now, in memory of this, the people throw down a rope in their midst and chop it up. — 357c-d
Later, as they relate, Osiris came to Horus from the other world and exercised and trained him for the battle. After a time Osiris asked Horus what he held to be the most noble of all things. When Horus replied, “To avenge one’s father and mother for evil done to them,” Osiris then asked him what animal he considered the most useful for them who go forth to battle; and when Horus said, “A horse,” Osiris was surprised and raised the question why it was that he had not rather said a lion than a horse. Horus answered that a lion was a useful thing for a man in need of assistance, but that a horse served best for cutting off the flight of an enemy and annihilating him. When Osiris heard this he was much pleased, since he felt that Horus had now an adequate preparation. It is said that, as many were continually transferring their allegiance to Horus, Typhon’s concubine, Thueris, also came over to him; and a serpent which pursued her was cut to pieces by Horus’s men, and now, in memory of this, the people throw down a rope in their midst and chop it up. – 358-c-d
Now the battle, as they relate, lasted many days and Horus prevailed. Isis, however, to whom Typhon was delivered in chains, did not cause him to be put to death, but released him and let him go. Horus could not endure this with equanimity, be laid hands upon his mother and wrested the royal diadem from her head; but Hermes put upon her a helmet like upon the head of a cow. Typhon formally accused Horus of being an illegitimate child, but with the help of Hermes to plead his cause it was decided by the gods that he also was legitimate. Typhon was then overcome in two other battles. Osiris consorted with Isis after his death, and she became the mother of Harpocrates, untimely born and weak in his lower limbs. – 358d-e
As they regard the Nile as the effusion of Osiris, so they hold and believe the earth to be the body of Isis, not all of it, but so much of it as the Nile covers, fertilizing it and uniting with it. From this union they make Horus to be born. The all-conserving and fostering Hora, that is the seasonable tempering of the surrounding air, is Horus, who they say was brought up by Leto in the marshes round about Buto; for the watery and saturated land best nurtures those exhalations which quench and abate aridity and dryness. – 366b
For this reason also it is said that Isis, when she perceived that she was pregnant, put upon herself an amulet on the sixth day of the month Phaophi; and about the time of the winter solstice she gave birth to Harpocrates, imperfect and premature, amid the early flowers and shoots. For this reason they bring to him as an offering the first-fruits of growing lentils, and the days of his birth they celebrate after the spring equinox. When the people hear these things, they are satisfied with them and believe them, deducing the plausible explanation directly from what is obvious and familiar. – 377c