Abu Huraira reported:
أَقْرَبُ مَا يَكُونُ الْعَبْدُ مِنْ رَبِّهِ وَهُوَ سَاجِدٌ فَأَكْثِرُوا الدُّعَاءَ ””
“The Messenger of Allah (ﷺ) said: The nearest a servant comes to his Lord is when he is prostrating himself, so make supplication (dua) (in this state).” (Muslim, Salat 482; Abu Dawood, Salat 391; Nasai, At-Tatbiq, 1029)
Messenger Muhammad (pbuh) used to make various invocations (dua) during prostration at the prayer. They were related in detail in several hadith books. Two of them are below:
“Allahummaghfirli: Oh Allah, forgive me!”.
“Allahummaghfirli zanbi kullahu diggahu wa jillahu wa awwalahu wa aakhirahu alaniyatahu ve sirrahu: Oh Allah, forgive my sins, the minor, the major, the first, the latest, the open and the secret, all of them!”
These and many other invocations of Prophet Muhammad (pbuh) can be found in the book “The Prophet’s Prayer As Though You See It” by Muhammad Nasiruddeen al Albani.
When we read these invocations, we see that they are not verses but sincere invocations made freely. This reveals that we can ask of God during the prostration, after the routine supplication, using the words we like and in the language we like.