Allahumma-ftah li abwaba rahmatik.
O Allah, open the doors of Your mercy for me.
Source and meaning
Sahih Muslim 713a gives the two occasions together. The entry card preserves the request connected with going into the mosque, rather than merging entry and exit into one quotation.
Asking for mercy gives a meaningful focus to arriving for worship. Read the English meaning alongside the Arabic so that the words become an understood request, not merely a sound recited at a doorway.
Using the entry wording
Learn the short text before your visit and recall it as you enter. If you are joining a congregation, follow the prayer and local arrangements without obstructing an entrance to consult a phone.
Foot order, salutations on the Prophet and the greeting prayer are related topics, but they need their own references and teaching. Their details should not be invented from this particular source card.
A manageable learning method
Divide the Arabic into small phrases and practise with a competent reader. Keep the source title on your saved card, especially if you are comparing a longer version from another booklet.
For a child or new learner, explain the meaning of mercy and the difference between coming in and going out. A brief, accurate lesson is more useful than combining every mosque-related formula at once.
Common questions
Is the leaving wording the same? No; the source connects it with asking for Allah’s bounty. Must a longer version replace this one? A longer quotation needs its own reference. What if I forgot it at the door? This page explains remembrance, not a ruling that your visit is invalid. Does it replace salah? It is a supplication connected with entry, not a substitute for prayer.