While returning from travel
اللّٰهُ اَکۡبَرُ ، اللّٰهُ اَکۡبَرُ ، اللّٰهُ اَکۡبَرُ ، لاَ إِلَهَ إِلاَّ اللّٰهُ وَحْدَهُ لاَ شَرِيكَ لَهُ، لَهُ الْمُلْكُ، وَلَهُ الْحَمْدُ، وَهُوَ عَلَى كُلِّ شَىْءٍ قَدِيرٌ، آيِبُونَ تَائِبُونَ عَابِدُونَ سَاجِدُونَ لِرَبِّنَا حَامِدُونَ، صَدَقَ اللّٰهُ وَعْدَهُ وَنَصَرَ عَبْدَهُ وَهَزَمَ الأَحْزَابَ وَحْدَهُ
Allah is the greatest, Allah is the greatest, Allah is the greatest. None has the right to be worshipped except Allah, alone, without partner. To Him belongs all sovereignty and praise, and He is over all things omnipotent. We return, repent, worship and praise our Lord. Allah fulfilled His promise, aided His Servant, and single-handedly defeated the allies.
Sahih Al-Bukhari: 1797