.سَمِعَ اللَّهُ لِمَنْ حَمِدَهُ – Sami‘ Allâhu liman hamidah.
Allâh hears whoever praises Him. [al-Bukhârî, Muslim]
This hearing of Allâh subhânahu wa ta‘âlâ is the hearing of response; it means that Allâh answers the one who calls upon Him. He responded to the one who praised Him and He rewarded him. This does not mean that Allâh only hears, because Allâh hears the one who praises Him and the one who does not praise Him, but it means here that Allâh answers the one who praises Him with reward and this hearing is the kind that points to the hearing of response. [Shaykh Muhammad ibn Sâleh al-‘Uthaymîn رحمه الله]
Al-Baghawî said in Sharh as-Sunnah Vol 3, pg 113, that the meaning of “Sami‘ Allâhu liman hamidah” is “May Allâh accept his praise and answer him.”
A point to note: Why do we say “Sami‘ Allâhu liman hamidah” when we straighten up from ruku‘? This is because when we go into sujûd, we will be the closest we can ever be to Allâh subhânahu wa ta‘âlâ, and during which, du‘â’s are always answered. Any du‘â’ made before Allâh subhânahu wa ta‘âlâ is only proper and acceptable when preceeded by praise and much extolling. Just as Sûrah al-Fâtihah starts out with praise before the great du‘â’ is made (’Ihdinas-siratal-mustaqîm), the same holds true here. “Sami‘ Allâhu liman hamidah” therefore, signals us to praise Allâh much before we are to make our du‘â’s when in sujûd.
Allah SWT Knows Best!
From the book “REACHING OUT TO MY RABB”