The edge of the sun appears delay the prayer

Bismillah Walhamdulillah Was Salaatu Was Salaam 'ala Rasulillah

As-Salaam Alaikum Wa-Rahmatullahi Wa-Barakatuhu

Narrated Hisham's father (Radi-Allahu 'anhu):

Ibn 'Umar said, "Allah's Apostle (Sallallahu 'Alaihi Wa Sallam) said, 'Do
not pray at the time of sunrise and at the time of sunset.'

Ibn 'Umar said, "Allah's Apostle (Sallallahu 'Alaihi Wa Sallam) said, 'If
the edge of the sun appears (above the horizon) delay the prayer till it
becomes high, and if the edge of the sun disappears, delay the prayer till
it sets (disappears completely).' "

Bukhari Vol. 1 : No. 557