قَالَ الإِمَامُ الصَّادِقُ عَليهِ السَّلامْ:
أَنْ يَسْتَخِيرَ اللهَ الرَّجُلُ لا فِي أَخِرِ سَجْدَةٍ مِنْ رَكْعَتيِ الْفَجْرِ مِائَة مَرّةٍ و مَرّةً تَحْمَدُ اللهَ وَ تُصِلَّي عَلَىَ النَّبِي وَآلِهِ ثُمَّ تَسْتَخِيرُ اللهَ خَمْسينَ مَرَّةً ثُمَّ تَحْمَدُ اللهَ وَ تُصَلِّي عَلَىَ النًبِيَّ وَ تَمِّمْ الْمِائةَ وَ الْوَاحِدَة.
Imam al‑Sadiq (as) said the following regarding asking Allah for the best: "In the final sajdah of the recommended prayers of Salat al‑Fair, one should seek the best from Allah by praising Allah and sending blessings on the Prophet and his family and then by asking Allah for the best fifty times followed by praising Allah and sending blessings on the Prophet one hundred and one times. " 4
أَنْ يَسْتَخِيرَ اللهَ الرَّجُلُ لا فِي أَخِرِ سَجْدَةٍ مِنْ رَكْعَتيِ الْفَجْرِ مِائَة مَرّةٍ و مَرّةً تَحْمَدُ اللهَ وَ تُصِلَّي عَلَىَ النَّبِي وَآلِهِ ثُمَّ تَسْتَخِيرُ اللهَ خَمْسينَ مَرَّةً ثُمَّ تَحْمَدُ اللهَ وَ تُصَلِّي عَلَىَ النًبِيَّ وَ تَمِّمْ الْمِائةَ وَ الْوَاحِدَة.
Imam al‑Sadiq (as) said the following regarding asking Allah for the best: "In the final sajdah of the recommended prayers of Salat al‑Fair, one should seek the best from Allah by praising Allah and sending blessings on the Prophet and his family and then by asking Allah for the best fifty times followed by praising Allah and sending blessings on the Prophet one hundred and one times. " 4
Notes:
4. Wasa'il ash‑Shia, Volume 8, Page 73, Hadith 10112 / Man La Yahdhuru al‑Faqih, Volume 1, Page 355, Hadith 1556