Narrated Zaid bin Arqam (RA):

Allah's Messenger (ﷺ) said: "The prayer of those who are penitent is offered when the young weaned camels feel the heat of the sand." [Reported by at-Tirmidhi].

وَعَنْ زَيْدِ بْنِ أَرْقَمَ; أَنَّ رَسُولَ اَللَّهِ ‏- صلى الله عليه وسلم ‏-قَالَ: { صَلَاةُ اَلْأَوَّابِينَ حِينَ تَرْمَضُ اَلْفِصَالُ } رَوَاهُ اَلتِّرْمِذِيُّ .‏ [1]‏ .‏