Musannaf Ibn Abi Shaybah 3053 — What is permitted to be said after

Mus'ab bin Sa'd said: When Sayyiduna Sa'd (may Allah be pleased with him) had recited the tashahhud, he would say these words: "Glory be to Allah, as much as fills the heavens and the earth, and fills what is between them, and fills what is beneath the soil; all praise is for Allah, as much as fills the heavens and the earth, and fills what is between them, and fills what is beneath the soil; Allah is the Greatest, as much as fills the heavens and the earth, and fills what is between them, and fills what is beneath the soil (Shu'bah said: I do not know whether he said 'Allah is the Greatest' first or 'All praise is for Allah' first); and all praise is for Allah, praise that is pure and blessed. There is no god but Allah, alone, without any partner; His is the dominion and His is the praise, and He has power over all things. O Allah, I ask You for all that is good." After making this supplication he would give the salam.