أَسْتَوْدِعُ اللَّهَ دِينَكَ وَأَمَانَتَكَ وَخَوَاتِيمَ عَمَلِكَ
Astawdi'ullaha dinaka wa amanataka wa khawatima 'amalik
Encomiendo a Allah tu religión, tu confianza y la conclusión de tus obras.
Dua said by the traveler for the one staying behind
Mutual dua between traveler and resident is from the sunnah.