When the month of Ramadan enters
O Allah, let us see the new moon with security and faith.
TravelHisnul Muslim
اللَّهُمَّ أَهِلَّهُ عَلَيْنَا بِالْأَمْنِ وَالْإِيمَانِ
Transliteration
Allahumma ahillahu 'alayna bil-amni wal-iman
Meaning
O Allah, let us see the new moon with security and faith.
When to say
When sighting the Ramadan crescent.
Reference
At-Tirmidhi
Educational only. Verify wording and grading in a trusted edition or with a qualified scholar.