The report which says one should say “ Wa ana ‘ala dhaalika min al-shaahideen (And I am one of those who testify to that)” after reciting Soorat al-Teen is da’eef (weak)

Assalaamu 'alaykum wa rahmatu 'Llahi wa barakatuh
Is there a hadith that mentions after reciting the last ayah of surah At-Tin (#95) that one should say what means,"No doubt and I testify to it." Is that hadith authentic and where can I find it ?
Jazzakallahu Khayrun

Praise be to Allaah.

Al-Tirmidhi, may Allaah have mercy on him, said in his Sunan: “Ibn Abi ‘Umar told us, Sufyaan told us from Ismaa’eel ibn Umayyah who said: ‘I heard a Bedouin Arab man say, “I heard Abu Hurayrah say, narrating this, ‘Whoever recites “Wa’l-teeni wa’l-zaytoon (By the fig, and the olive)” [al-Teen 95:1 – interpretation of the meaning] then recites “Alaysa Allaahu bi ahkam il haakimeen (Is not Allaah the Best of judges?)” [al-Teen 95:8 – interpretation of the meaning], let him say, “Balaa wa ana ‘ala dhaalika min al-shaahideen (Yes indeed, and I am one of those who testify to that).”’”’” Abu ‘Eesa said: “This hadeeth was narrated with this isnaad from this Bedouin from Abu Hurayrah, but his name is not given.” Thus al-Tirmidhi (may Allaah have mercy on him) explained the fault in this isnaad, which is the fact that this Bedouin is not known (jahaalah). On this basis, the isnaad is da’eef (weak), and the hadeeth is not saheeh. Abu Dawood (may Allaah have mercy on him) also narrated this report (753) from the same Bedouin. Al-‘Allaamah al-Albaani also classed the hadeeth as da’eef in his book Da’eef al-Jaami’, no. 5784. As the hadeeth is not proven, we cannot follow it. And Allaah knows best.