أَسْتَوْدِعُ اللَّهَ دِينَكَ وَأَمَانَتَكَ وَخَوَاتِيمَ عَمَلِكَ
Astawdi'ullaha dinaka wa amanataka wa khawatima 'amalik
Ich vertraue Allah deine Religion, dein Anvertrautes und den Abschluss deiner Taten an.
Dua said by the traveler for the one staying behind
Mutual dua between traveler and resident is from the sunnah.