It is narrated from Sayyiduna Ibn Abbas (may Allah be pleased with them both) that when the Messenger of Allah (peace and blessings be upon him) returned from a journey and saw his family, he would say this supplication: 'Awban awban, ila rabbina tawban, la yughadiru 'alayna hawban' ((We are) returning, returning, to our Lord in repentance, a repentance that leaves no sin upon us). This hadith is sahih (authentic) on the condition of the two Shaykhs, because Imam Bukhari used Ikrimah as evidence and Imam Muslim used Simak bin Harb as evidence, but they did not record it.