how to namaz?

Rabbi-ighfir lee Rabbi-ighfir lee

You have to say it twice,

I don't think it's "rabil" either btw.

Although you could also recite another dhikr in that position:

At-Tirmidhi (284) narrated from Ibn ‘Abbaas (may Allah be pleased with him) that the Prophet (blessings and peace of Allah be upon him) used to say between the two prostrations: “Allaahumma ighfir li warhamni wajburni wahdini warzuqni (O Allaah, forgive me, have mercy on me, console me, guide me, and grant me provision).”

Abu Dawood (850) narrated it as follows: “Allaahumma ighfir li warhamni wa ‘aafini wahdini warzuqni (O Allaah, forgive me, have mercy on me, grant me well being, guide me and grant me provision).”

Ibn Maajah (898) narrated it as follows: “Rabb ighfir li warhamni wajburni warzuqni warfa‘ni (O Lord, forgive me, have mercy on me, console me, grant me provision and raise me in status).

You can read more here: https://islamqa.info/en/104447

In manaz we must recite Al Fatihah in every raka'at plus other short surah while you are standing as recommended .After that you must make rukoo by saying subhana rabbiyal adheem then you must say sami allahu liman khamidah then you make prostration by sying subhana rabbiyal ala then you are sitting by saying allahu maghfirli war hamni war zukni wah dini wa afini.wa fu ani

You should say Rabb ighfir li between the two prostration

But I don't..

You can say whatever dua you like if you cannot remember the above

the sissy song lol