And when the star Sirius is mentioned because it cuts across the sky horizontally, it is the most evident of the stars after the completion of the ability to act by choice. Although it is among that category which is sworn by at the beginning of the Surah, it is due to its passing in its course horizontally over all the stations that the Arabs used to seek rain by it and attribute the coming of the necessity that leads to wealth to it. Abu Kabsha al-Khuza'i worshipped it instead of Allah because it was for him the greatest of the stars. Allah, the Exalted, indicated with certainty the foolishness of those who worshipped it by saying: "And indeed, He is" meaning no one other than Him, "the Lord of Sirius," meaning the complete in its meaning, which is the crossing. The scholars of the stars say that the astronomical rulings attributed to it are the most correct that can be attributed to the upper world. It is a star that illuminates behind the constellation of Gemini and is called the Dog of the Giant. The constellation of Gemini is named after the Giant, likening it to a king on his throne with a crown on his head. Al-Razi said in his Luminaries: It is one of the two stars of the arms of the lion. Ibn al-Qass said in his book of the signs of the Qibla: It is seen during the morning prayer as a bright star, its light exceeding the light of all the other stars around it, and the morning has obscured the light of all the other stars. As for the other Sirius, it is al-Ghumaisa - with a ghain that is pronounced and a sad that is not pronounced - it is less luminous than it, and that is why it is called al-Ghumaisa. Al-Qazzaz said in his collection: It is said that she wept for her sister, so her eye became dim, meaning it was obscured and went away.