Jazaak Allaahu Khairan:

The Prophet (peace and blessings of Allaah be upon him) said: “Whoever has a favour done for him and says to the one who did it, ‘Jazak Allaahu khayran,’ has done enough to thank him.” 

[Narrated by al-Tirmidhi, 1958 & 2035; Abu Dawood (1672) and by al-Nasaa’i in al-Sunan al-Kubra (6/53); classed as saheeh by al-Albaani in Saheeh al-Tirmidhi.].

“You are the Ansaar, may Allaah reward you with good (jazaakum Allaahu khayran), for you are decent and patient.” [Narrated by Ibn Hibbaan (7277) and al-Haakim (4/79). He said: its isnaad is saheeh, and al-Dhahabi agreed with him. Shaykh al-Albaani said in al-Silsilah al-Saheehah (3096): It is as they said].

Usayd ibn al-Hudayr (may Allaah be pleased with him) said to ‘Aa’ishah (may Allaah be pleased with her): May Allaah reward you with good (O ‘Aa’ishah), for by Allaah, you never have any problem but Allaah grants you a way out and makes it a blessing for the Muslims. Narrated by al-Bukhaari (336) and Muslim (367).

Ibn ‘Umar (may Allaah be pleased with him) said: I came to my father when he was wounded and they praised him and said: May Allaah reward you with good, and he said: I have hope and fear – meaning hope for that which is with Allaah of reward and mercy, and fear of that which is with Him of punishment [Saheeh Muslim 1823].

Baarakallaahu Feek:

“Whoever among you sees something in himself or in his possessions or in his brother that he likes, let him pray for blessing for it, because the evil eye is real.” Narrated by Ibn al-Sunni in ‘Aml al-Yawm wa’l-Laylah, p. 168; and by al-Haakim, 4/216. Classed as saheeh by al-Albaani in al-Kalim al-Tayyib, 243.

It was reported from Abu Umaamah ibn Sahl ibn Hunayf that his father told him that the Messenger of Allaah (peace and blessings of Allaah be upon him) went out and they travelled with him towards Makkah until they reached Shi’b al-Khazzaar in al-Juhfah. Sahl ibn Hunayf washed himself, and he was a white man with a handsome body and skin. ‘Aamir ibn Rabee’ah, the brother of Bani ‘Udayy ibn Ka’b, looked at him when he was washing, and said, “I have never seen anything like this, not even the skin of a virgin in seclusion!” (this was a metaphor for the intense whiteness of his skin). Then Sahl suffered a seizure (an epileptic fit, in which he fell to the ground). He was brought to the Messenger of Allaah (peace and blessings of Allaah be upon him) and it was said, “O Messenger of Allaah, do you know what has happened to Sahl? By Allaah, he cannot raise his head and he will not wake up.” He said, “Do you accuse anyone with regard to him?” They said, “‘Aamir ibn Rabee’ah looked at him.” So the Messenger of Allaah (peace and blessings of Allaah be upon him) called ‘Aamir and spoke angrily with him, saying, “Would any of you like to kill his brother? If you see something that you like, why do you not pray for blessing for it?” Then he said to him (‘Aamir), “Do ghusl for him.” So he washed his face, hands, elbows, the soles of his feet and inside his izaar (lower garment) from a vessel, then that water was poured over him (Sahl) – a man poured it over his head and back from behind, tilting the vessel. This was done to him, then Sahl went on with the people and there was nothing wrong with him. (Al-Musnad, 3/486. Al-Haythami said: the men of Ahmad are the men of saheeh. Al-Majma’, 5/107).

The Prophet sallahu alayhi wa salam was give a sheep and he divided it. Aisha said when the servant returned what did they say? The servant said: Barakallahu feekum. So Aisha said: wa feehum barakallah. We respone to them what they said and the reward remains for us. [Reported by Aisha radiallahu anhaa. Graded Saheeh by Al-Albani in Saheeh Kalim at-Tayyib no. 239]