Sayyiduna Abu al-Darda' (may Allah be pleased with him) narrates: My beloved friend (peace and blessings be upon him) instructed me to remember Allah abundantly.
Al-Tabarani recorded it; its chain contains Yazid bin Iyad bin Ju'dubah, who is a kadhdhab (liar).
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب الأذكار / 16754