Reference : Hisn al-Muslim 259

مَنْ قَالَ (سُبْحَانَ اللَّهِ الْعَظِيمِ وَبِحَمْدِهِ) غُرِسَتْ لَهُ نَخْلَةٌ فِي الْجَنَّةِ
Whoever says:
Subḥānallāhi ‘l-'Aẓīmi wa biḥamdih
will have a date palm planted for him in Paradise.

Whoever says:

Glorified is Allah the Most Great and praised is He.

will have a date palm planted for him in Paradise.

Reference:
At-Tirmidhi 5/511, and Al-Hakim who graded it authentic and Ath-Thahabi 
agreed 1/501. See also Al-Albani, Sahihul-Jami' As-Saghir 5/531 and Sahih 
At-Tirmidhi3/160.

Chapter: Excellence of Tasbih, Tahmid, Tahlil, and Takbir