Should one say: The sun Kasafat or Khasafat?

English translation

Narrated Aisha:

(the wife of the Prophet) On the day when the sun Khasafat (eclipsed) Allah's Messenger (ﷺ) prayed; he stood up and said Takbir and recited a prolonged recitation, then he performed a prolonged bowing, then he raised his head and said, "Sami`a l-lahu Lyman Hamidah," and then remained standing and recited a prolonged recitation which was shorter than the first. Then he performed a prolonged bowing which was shorter than the first. Then he prostrated and prolonged the prostration and he did the same in the second rak`a as in the first and then finished the prayer with Taslim. By that time the sun (eclipse) had cleared He addressed the people and said, "The sun and the moon are two of the signs of Allah; they do not eclipse (Yakhsifan) because of the death or the life (i.e. birth) of someone. So when you see them make haste for the prayer."