It was narrated to me by Moḥammed bin Mūsa bin al-Mutawakkil, who said – it was narrated to me by ʿAlī bin al-Ḥussain al-Saʿd al-Ābādi, from Aḥmed bin Abī ʿAbd Allāh, from ʿAlī bin al-Ḥakam, from Sayf bin ʿAmīra, from Zayd al-Shaḥḥām:

From Abī ʿAbd Allāh عليه السلام, who said: Whoever says ‘All Praise is due to Allāh, as He deserves’ (al-Ḥamdulillah Kamā Huwa Ahluh) Allāh will busy the scribers of the Heavens.
It was said: ‘And how will the scribers of the Heavens be busy?’
He replied: They say: ‘Oh Allāh, we do not have knowledge of the unseen.’
He (the Imām) said, He (Allāh) replied: ‘Write it just as how my servant said it, and upon me is its reward.’

حدثني محمد بن موسى بن المتوكل قال حدثني علي بن الحسين السعد آبادي عن أحمد بن أبي عبد الله عن علي بن الحكم عن سيف بن عميرة عن زيد الشحام عن أبي عبد الله عليه السلام قال من قال الحمد لله كما هو أهله شغل الله كتاب السماء، قيل وكيف يشغل كتاب السماء؟ قال يقولون اللهم إنا لا نعلم الغيب، فقال فيقول: اكتبوها كما قالها عبدي وعلي ثوابها