It was narrated by ‘Abdullah, the son of Imam Ahmad, in Zawaa’id al-Musnad(2346), at-Tabaraani in al-Awsat (3939), al-Bayhaqi in ash-Shu‘ab (3534) and Abu Nu‘aym in al-Hilyah (6/269) via Zaa’idah ibn Abi ar-Ruqaad who said: Ziyaad al-Numayri told us, from Anas ibn Maalik who said: When Rajab began, the Messenger of Allah (blessing and peace of Allah be upon him) said:
“O Allah, bless us in Rajab and Sha‘baan, and let us reach Ramadan.”
This chain is da‘eef. Ziyaad al-Numayri is da‘eef and was classed as such by Ibn Ma‘een. Abu Haatim said: He cannot be quoted as evidence. Ibn Hibbaan mentioned him in ad-Du‘afa’ and said: It is not permissible to quote him as evidence.
Mizaan al-I‘tidaal (2/91)
Zaa’idah ibn Abi ar-Ruqaad is more da‘eef than him. Abu Haatim said: He narrated from Ziyaad al-Numayri, from Anas, odd marfoo‘ hadeeths, which we know only from him or from Ziyaad. Al-Bukhaari said: His hadeeths are odd. an-Nasaa’i said: His hadeeths are odd. It says in al-Kuna: He is not trustworthy. Ibn Hibbaan said: He narrates odd hadeeths from well known people and his reports cannot be quoted as evidence or written down, except for the purpose of giving an example (of a weak hadeeth). Ibn ‘Adiyy said: al-Miqdami and others narrated from him obscure hadeeths, and some of his hadeeths contain odd material.
Tahdheeb at-Tahdheeb (3/305-306).
The hadeeth was classed as da‘eef by an-Nawawi in al-Adhkaar (p. 189) and Ibn Rajab in Lataa’if al-Ma‘aarif (p. 121). It was also classed as da‘eef by al-Albaani in Da‘eef al-Jaami‘ (4395). Al-Haythami said: It was narrated by al-Bazzaar, and its isnaad includes Zaa’idah ibn Abi ar-Ruqaad. Al-Bukhaari said: His hadeeth is odd, and a number of scholars regarded him as ignorant.
Majma‘ az-Zawaa’id (2/165)