Istighasa to the Prophet according Sunnism / Part 2

In the book Wafa 'al-Wafa', Samhoudi writes:

 اعلم أن الاستغاثة والتشفع بالنبی صلی الله علیه وسلم وبجاهه وبرکته إلی ربه تعالی من فعل الأنبیاء والمرسلین، وسیر السلف الصالحین، واقع في كل حال، قبل خلقه صلى الله تعالى عليه وسلم وبعد خلقه، في حياته الدنيوية ومدة البرزخ وعرصات القيامة

Know that doing Istighasa to the Holy Prophet PBUH, using his degree and honor before God, has been the action that the prophets and messengers and the piouspeoplw used to practice. It is permissible to do Istighasa to the Prophet at all times; whether before and after his  creation; whether during his lifetime and after his death in Barsakh and Qiyamah.

 وفاء الوفاء بأخبار دار المصطفی ، الفلس الثالث فی تهّل الزائر ، ج 4 ، ص 193
Wafa 'al-Wafa' with the news of Al-Mustafa, the third chapter in Tawassul Al-Zayer, vol. 4, p. 193

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In other words, the prophets of the Holy Prophet (PBUH) used to appeal to the Prophet of Islam (PBUH). This is also the practice of the righteous predecessor.