المحيط
كلمة (المحيط) في اللغة اسم فاعل من الفعل أحاطَ ومضارعه يُحيط،...
Ka‘b ibn ‘Ujrah (may Allah be pleased with him) reported that the Prophet (may Allah's peace and blessings be upon him) said: "There are statements of remembrance following the prayer; whoever says or does them will never be a loser. These are: glorifying Allah thirty-three times, praising Him thirty-three times, and magnifying Him thirty-four times."
شرح الحديث :
This Hadīth demonstrates that saying the mentioned set of remembrance after the five obligatory prayers is prescribed. The wisdom behind this is that during this time, the deeds are raised and the doors of acceptance are opened. Thus, there is a better chance for these deeds to be accepted.