The prayer of the penitent should be observed when the young weaned camels feel heat of the sun.
Sahih Muslim Book 6, Hadith 176
← Previous Hadith They well know that prayer at another time than this is more excellent, for Allah's Messenger (ﷺ) said: The prayer of those who are penitent is observed when your weaned camels feel the heat of the sun.

Sahih Muslim Book 6, Hadith 175 Next Hadith → Prayer during the night should consist of pairs of rak'ahs, but if one of you fears morning is near, he should pray one rak'ah which will make his prayer an odd number for him.

Sahih Muslim Book 6, Hadith 177