When standing up from ruku’, one should say the tasmee’:
سَمِعَ اللهُ لِمَنْ حَمِدَهْ
Allah Ta’ala hears the one who praises Him
Thereafter, one should recite the tahmeed:
رَبَّنَا لَكَ الْحَمْد
Our Lord, for You alone is all praise.
One may also recite the following dua in qaumah when one is performing sunnats or nawaafil salaah. However, if the imaam delays in qaumah, then one may also recite it in one’s fardh salaah:
رَبَّنَا وَلَكَ الحَمْدُ حَمْدًا كَثِيرًا طَيِّبًا مُبَارَكًا فِيهِ
Our Lord, for You alone is all praise, such praises that are plentiful, pure and full of blessings
عن رفاعة بن رافع الزرقي، قال: كنا يوما نصلي وراء النبي صلى الله عليه وسلم، فلما رفع رأسه من الركعة قال: سمع الله لمن حمده، قال رجل وراءه: ربنا ولك الحمد حمدا كثيرا طيبا مباركا فيه، فلما انصرف، قال: من المتكلم قال: أنا، قال: رأيت بضعة وثلاثين ملكا يبتدرونها أيهم يكتبها أول (صحيح البخاري، الرقم: 799)
Hazrat Rifaa’ah bin Raafi (radhiyallahu anhu) says, “We once performed salaah behind Rasulullah (sallallahu alaihi wasallam). When he raised his head from ruku, he recited سَمِعَ اللهُ لِمَنْ حَمِدَهْ. A person behind him (in the congregation) then said:
رَبَّنَا وَلَكَ الحَمْدُ حَمْدًا كَثِيرًا طَيِّبًا مُبَارَكًا فِيهِ
After completing the salaah, Rasulullah (sallallahu alaihi wasallam) turned (to the Sahaabah) and asked, “Who among you had spoken during the salaah (i.e. who had recited the dua)?” The person responded saying, “I was the person.” Rasulullah (sallallahu alaihi wasallam) then said, “I had seen over thirty angels rushing (to take the great rewards of the dua which you had recited), each one competing with the other in regard to who will record it first.”