WE RELATE FROM the Sunan of Abū Dāwūd, with a ṣaḥīḥ isnād, that Jābir 
reported that the Messenger of Allah 
said: “Do not supplicate against yourselves, do not supplicate against your children, do not supplicate against your servants, and do not supplicate against your wealth. Do not [make your du‘ā’] coincide with a moment from Allah in which a gift is obtained and [your supplication] is accepted from you.” [1].
reported that the Messenger of Allah said: “Do not supplicate against yourselves, do not supplicate against your children, do not supplicate against your servants, and do not supplicate against your wealth. Do not [make your du‘ā’] coincide with a moment from Allah in which a gift is obtained and [your supplication] is accepted from you.” [1].Nīla, ‘is obtained’, is written with a kasrah on the nūn and a sukūn on the yā’, and it means the moment of response in which the seeker obtains and is given what he seeks.
Muslim narrates this hadith at the end of his Ṣaḥīḥ and says: “Do not supplicate against yourselves, do not supplicate against your children, and do not supplicate against your wealth. Do not [make your du‘ā’] coincide with a moment from Allah in which He is asked for a gift and He answers you.” [2].
References
[1] Abū Dāwūd (1532) and Muslim (3006).
[2] Muslim (3009).