Sayyiduna Abu al-Darda' (may Allah be pleased with him) relates: I heard the Prophet (peace and blessings be upon him) saying: "Whoever performs ablution and does it well, then prays two rak'ahs and supplicates to his Lord, his supplication is answered, whether quickly or with some delay. And beware of looking around during the prayer, for there is no prayer for the one who looks around. If you are overcome, then do so in the voluntary prayer, but do not do so in the obligatory prayer."
Al-Tabarani recorded it in al-Mu'jam al-Kabir; its chain contains Ata' bin Ajlan, who is da'if (weak).
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب الصلاة / 2431